Sagittarius (sun/venus/moon) have a bad rep for not being able to commit to someone which isn’t necessarily true.
The focus is all wrong, the issue is not whether or not they can commit because they can. The issue is whether or not they are ready to commit and this is something Sagittarius dont even know in themselves.
This sign is one of adventure and freedom, Jupiter is a planet of expansion. The biggest planet in our solar system. So naturally they want the freedom to be able to expand, grow, explore, roam and just be themselves and free. They are natural loners of the zodiac and are actually okay with being alone and don’t tend to run away from it (unless they have water placements in their moon/mars/mercury/venus then affection is needed so being alone and wanting company is a battle they face a lot)
Sagittarius love the idea of being in a relationship. Not because of the same reasons as signs like water who want affection or earth who want stability or Air who want sociability. Sagittarius don’t want to put their lives on pause and they romanticise on the idea of living their lives alongside someone. All their adventures, their success, their happiness, they want someone to share it with. Their knowledge, wisdom gained from research and/or travel, they want someone to teach it to. The truth/honesty/secrets in life they seek, they want to learn it from someone. This is what Sagittarius are seeking in relationships, this is why they want it. They’re also very animalistic and want someone they can release to sexually.
The issue is what comes with the rest of the nice part of commitment. The responsibilities. Sagittarius want all that fun, enjoyment, optimism and cheer with no responsibility of someone else’s emotions and happiness. Sagittarius are their own happiness and can sometimes struggle remaining happy around what they would consider negative people with negative moody energy. This is why relationships can be something they shy from. They are impatient people, although they would love to wipe your tears and cuddle you till you’re happy again, there’s only so much of that they can do. It gets boring and miserable and eventually turns them boring and miserable.
Sagittarius also get heavy relationship anxiety. Sag are not aware usually that their nature is to be alone until they are ready to commit. This comes at different stages for different people. But sag lead with emotions and impulse. They allow passion and the chase to take over everything else and focus on the fact that they want you. Ignoring the fact that once they have you, they may actually not be ready to take it to the next level. Once they have you the chase is over, so they are forced to face the facts that they are now either in a relationship or going to get into one. This realisation puts them in positions where they start to withdraw or realise, it isn’t for them.
Sagittarius women especially struggle with this. They can sometimes feel unworthy of love and although they are confident, they are fearful. That optimistic trait comes with a wanting to latch onto happiness and allowing themselves to emotionally commit sometimes scares them that later someone may not love them anymore once they really get to know them. Sag women are not super affectionate, so receiving affection is something they have not learned how to handle or absorb. They can reject it and lower their own value mentally through this. Seeing themselves as tough women who may not seem cute to a partner when that is not the case at all! It’s not that they can’t be in relationships, it’s that they didn’t realise they were not yet ready for one.
Sag men are mummy’s boys. Not all of them realise it but the relationship with their mothers can be at such a level they place a strong admiration on her and look for someone to mother them too. Especially the unruly mummy’s boys. The ones who went off the rails and now want someone that can steer them in the right direction and look for a mother in a woman. Sag men want to be babied and mothered. This can cause relationships to not be legit as it is a warped type of romance rather than a pure emotional one it should be. They don’t last, as mummy’s boys are entitled, spoiled and capable of ignoring guidance and rebelling.
The biggest reason why sag commitments don’t last is the serious tone relationships bring. Sag want a friend in a partner. They don’t want that extra seriousness that comes with it. The moment relationships turn into that the more claustrophobic sag feels, especially if all you do is argue, fight, see each other all the time (contradictory because they can be super clingy but long term can cause them to become too use to and eventually bored of you), stay at home etc. Even for anti social sag who do not want to go out, boredom in a relationship is suffocating. This can cause them to either want to leave it or sometimes just look for fun elsewhere. Cheating is not a sag thing however they are not anti it. It can happen. If it happens, it was not an emotional thing. Sag (depending on placement) can have unattached and unemotional sex just to feel that sense of freedom for a bit. For the sags that can’t get themselves to physically cheat on a partner, they can find themselves flirting and entertaining other people simply for fun and boredom purposes. They definitely do not like the person they’re doing it with. They’re in love with the one they’re doing it too. They just need stimulation and to feel as though they are not tied down with the boring parts of relationships.
So all in all sag can commit. They just need to learn to stop being super passionate and impulsive in decisions and actually look in themselves to see whether they are ready or not. If not, they should make it as clear as possible to all parties involved.