Why do guys seem to suck so much?

I just ask because lately I have had a similar thing happen to me TWICE that has never happened before. I met someone, started talking to them, we’re getting along all fine and dandy, and then out of the blue they just stop.

I mean… in both cases, we spent a week talking nearly constantly, hung out, continued to talk and make plans to see each other again, then radio silence.

And in one of these cases, the guy even bought me flowers! 

Anyway… I am so confused, it’s completely beyond me. Why?

Any thoughts as to why this is happening? What did I do?