Dear Prosper, Looker, chblueguy, 11flower and Jake212, thank you so much for taking the time to read and respond to my post. Appreciate it so much.
For one thing, I was always curious about his sexuality (whether he is straight or bi) and the more we got to know each other, the more curious I become. Every time we hang out together, I sometimes noticed him secretly checks other guys out (he checks other girls too). And sometimes he would comment on how good looking the guy or how cool his hair is or how broad their chest is (he gave me compliments the first time we met in class). The other day, we were watching some straight porn and I heard him saying the guy in that movie was not good looking. That gave me a little bit of a shock.
There were several times when I tried to bring up some gay issues; for instance we were watching a soccer match on TV, and the guy managed to score a goal and one of his team players kissed him on the lips. I spontaneously asked him if he thinks that guy is gay. He just gave me a shrug. So I continued telling him I've been kissed by a guy before in the same situation as the guy who scored that goal, but he didn't respond, either he was genuinely not interested or just too embarrass to talk about it, I don't know. These are the reasons why I dare to make those stupid acts (the groping and kissing) while he was sleeping, and one thing for sure, I will not do something like this if I was very confident the guy next to me is 100% straight. But then again, whether he was gay, bi or straight, I know it is still wrong to commit such acts, especially without that person consent.
11flower-I guess you are right, neither both of us wanted to acknowledge it and talk about it, since it may have embarrassed him as much as I'm. But Right now, as Jake212 said, I'm giving him the space he wants (he's having his exams this week so I don't want this thing to affect his study) and at the same time I'm giving my self some space (and break too) to think about this thing. Will try to find the right time to sit and talk with him about this issue. Of course, I will definitely say hi and ask how things are if I see him, just to let him know that I still want him to be my friend. Last time I met him, we did talk for a very short while (about his preparation for this exam), he was still "cordial" (lacking of word there).
Another thing, I'm very much in a closet right now regarding my sexual orientation, I think I'll be taking the risks of losing more friends if I were to tell them that i'm bisexual, especially to my guy friends, they would propably avoid me as they may think i've feelings for them.
Once again, thank you for reading and responding to my posts. Appreciate it so much. I appologize for the long post again.