Is this something bad for a relationship?

So as of recently I've been getting really frustrated with my boyfriend because I have noticed that he treats me like a friend when we are out at a party or around friends but not his friends. It makes me feel less important and we always talk about it. I've offered him the chance to be left and he can maybe use the space to think and I would have no problem with leaving him alone during the time but he insisted I didn't break it off. I know he cares about me but does he love? Does he find me less attractive? Is it a guy thing where showing affection to him makes him less manly? What does this mean?!