It seems like you changed your mind to yes when he asked other girl out, but I don’t think it’s worth it now because if he really liked you he wouldn’t ask other girl out.
You can’t talk about them that way, sure there are some jerks but not all of them are like that and it seems like you want a boyfriend just so you won’t be single.
I think you are still young and should wait a lil bit with relationships because that’s a serious thing and I don’t think you see it that way.
I wish you the best of luck 