Is age really just a number?

I'm 19 and my boyfriend is 30. We have gone out for about 3 months. There was a little hesitation on my side on whither or not we should become boyfriend and girlfriend but since we get along i was willing to try it out. (side note my other relationships have all ended after 2 weeks so this is new for me.) However today out of no where i was like...I think i may want to end this relationship. I've heard that once the idea to end a relationship crosses your mind its as good as done could there be hope to salvage the relationship? Also this may sound awful but its true, I'm quit a bit more attractive than he is, I want to look up at him and think, oh yea he is with me! not...oooh i'm with him???