My boyfriends always tell me i am the best girlfriend they have ever had, i never cheat or do them wrong, im not bitchy or bossy....but thinks go awry. i dont get it.

Saw one of my exboyfriends today. He was still dating the girl he cheated on me with she had gained about 70 pounds and she was 9 months pregnant wearing house shoes a ratty tshirt and some sweat pants. I first noticed them when i heard a shouting match across from Avalon Exchange in the loop. He was calling her a B and she was calling him worthless.  He noticed me and quickly shuffled over to say hello.  After about 5 minutes and 10 tries to get away from him he asks if my number is still the same and says we should reconnect.  I laughed and said you made your bed huney now lay in it.  I got a text 20 minutes ago with him apologizing and saying he made a mistake. i accepted his apology. He said I should have given you the world instead of giving you away.  I smiled and thought to myself, thats what they all say.