Emotions cover the full gamut of the human experience so I couldn't say that when I suck cock I'm not feeling any emotions at all. I love doing it and I love to provide that pleasure to the guy attached to the cock, whether I know him well or not. So yes I can do it without even knowing the guy, but it's definitely a better, more full experience when he's a friend.
I can certainly love men in a brotherly sort of way, whether our relationship is sexual or platonic. But as far as I know (i.e. never say never) it is impossible for me to be "in love" with another guy. Sex is a very pleasurable experience and I can share that experience with either men or women, or both at the same time for that matter. But making love is a much deeper personal interaction that I have only been able to experience with women.
As for making out with a guy, I can do that and have done that. But only because it's really important to him. It still doesn't do much for me, just the pleasure of knowing he's enjoying it. It's a lot like nip play to me. My nipples aren't at all wired to my sexual nerves and it doesn't stir my loins at all. But when a guy really wants to play with my nipples (gently, they're quite sensitive physically) I can get into it simply because it's pleasurable to him. To me sexual fulfillment is more about giving carnal pleasure than receiving it.