I don't think I'll ever be ready for a relationship

I'm 26 and I've dated quite a few guys (short-term) that never worked out. One of them turned into a year long relationship. The guy I'm seeing right now looks like it's going long term too.The thing is, I always feel as if I don't get enough from them. Not enough "sweet talk", not enough compliments, not enough validation. Every little thing they say that annoys me, I blow it out of proportion. I constantly fear they will replace me with someone else. This obviously stems from serious insecurities, but this makes me think that I should never be in a relationship with someone until I take care of that.