Don't worry, you're not alone. I'm 22 and I've had similar but but not exact issues as you. I've rejected guys cause I wasn't attracted to them, they were religious, or creeps.
Men haven't wanted to continue with me because they were scared of commitment.
The thing is tbh with app and online dating these days men (and women) have many options. So you get men in their late 20s and early 30s (and beyond) who still mess around, still are emotionally immature, don't want to commit. And tbh I can't really blame them; I've gotten scared of commitment too before. It's not a great dating/relationship culture nowadays like the traditional one of days past where people actually are serious. Not to scare you off it, you can find a suitable person but it WILL take a while. Like the other commenter said, you gotta get through many before you find the right one. Cut off those emotions and don't get attached from the beginning girl; try to see the person objectively and WATCH OUR FOR RES FLAGS. Even if they are so small.
Also you're not weird or anything. Many women in my city, despite having it all, don't have anyone yet. But I can see you are self-aware and honest, those are very good qualities to have that will attract the right man. So have hope!!! Also the best person for you will come along when you least expect it. Keep an eye out, talk to that cute guy at the bar YES but hang out with your girl friends and stay committed to those interests of yours. Generally people like to see others that have hobbies and interests, take care of themselves and simply have fun and not take life seriously (not that you do, this is just general advice. Trust me when I say this!). Then again with all this being said, I'm still pretty young and just want to enjoy being single and partying it up lol.
This is NOT to let anyone that leads anyone else on off the hook; that's a total asshole move and it's happened to me and many girls I know. Best bet is to make clear to the other person that you want something serious from the start (also please try to figure out, either by asking them or their friends, if they have a partner already...quite a lot of problem think it's ok to cheat these days. You really don't want to get caught up with toxic, terrible people and situations like that).
But that's just my 2 cents. Hope I helped a bit.