me or him because stupid?

So my boyfriends friend (let's call him bob), he is a full on 'f**kboy. He has sex with a different girl every night (legit he was so proud when he did it with a different girl every night for a whole month of 31 days!) anyway, before he was like this, we used to talk ( never did anything, just a few flirty texts) and my boyfriend doesn't trust him around me because he goes after any girl who moves basically, and asked me not to talk to him. Which I agreed to. But last night he messaged me asking how much I get payed at the cinema I work at, I replied because I find it so rude to ignore a text and I opened it which would have made it worse. My boyfriend got mad that I spoke to him but it was just like 3 texts about the pay and then he said thanks? Like I don't see the big deal but what do you guys think?
He also apparently said I have big boobs and a nice ass. Which I didn't know until just now but he told my boyfriends brother it the other day after I served him at work. Thoughts?