I’ve never felt more alive in my life

The problem isnt having any luck with attracting guys, I know I attract guys, and sometimes they are very attractive themselves. The problem that I have come to realize is me. I think I could really like someone, even almost see myself with them in a real relationship and tell myself to just go for it and do it.. but then something always happens to change that. I tend to find something that I dont like and it completely just throws me off, once that happens that poor guy has no chance at winning my heart anymore. Looking back before my previous relationship, I remember I use to do the same thing. how my ex actually stole my heart, when i was completely unhappy and not myself is beyond me, and now, once im single after knowing I deserve better I just cant find anyone once again.