Guys, do you ever say I love you casually?

Ive been friends with this guy (a virgo) for over a year. Recently we started hanging more and we eventually slept together a couple times(after he pursued me). The first time was not good but the second time was amazing and I really started liking him. Now I'm confused because he doesn't seem to want to see me anymore. He doesn't answer my calls or says he's really tired or busy. But then, a few days ago he was at my house, I was talking to my girlfriend about how all her guy friends fall for her and make it awkward. We were clearly talking about them falling in love with her. Then he says out of nowhere that he loves me and that is not awkward between us(maybe for him).
Guys, do you ever say I love you casually?
Post Opinion