I keep getting bored with men after about 4 months of solid dating. Not right men or self sabotage?

I pretty much do the same but after 6-7 months. For me is not the issue because I'm not ually active. I find little holes in the guys and fixate on them. For example, my first boyfriend didn't do enough sweet things, whereas my second boyfriend smothered me with sweet things. No one measures up by my standards.. I found that one question really helped me figure out what my problem was: do u compare the men you date to someone in particular? If u do, who is this person and how can you get closure?