In love with my best friend...

[I am male]
Lately... I have been having strong feelings toward my best friend (also male). we have known each other for a while and are really close friends, the two of us even think alike and have the same ideals... however, I'm writing because I think, no, I know that I am in love with him... he is a wise, kind hearted, funny, strong, genius, enigmatic Brooklyn Boriqueño(Puerto Rican) and the worlds greatest friend. we even often say "I love you" to each other and spend almost all of our time together; we even have the same class schedule and sit next to each other in each class, and when we are not around so many people, then we tend to sit close together, but I think that may be a habit we share, however, most of the time he begins to lean in a little closer and rub his leg or shoulder on my own. A couple times when we are were on a crowded train, he would hold on to me instead of one of the rails or if I held on to him, he would rub his cheek against my hand or my arm, and if someone were to question why we do things like that we would oddly say "its because we are brothers" (which makes the whole thing seem even more messed up). we often jokingly tell each other really vulgar and sexual things such as...

him: "You want dis Puerto Rican sausage?!"
me: " yea u know I want your big ass sausage!
him: "well bend over let me feed to to you!"

yea i know... that was a really odd conversation... We always end up doing things like that and it makes me wonder... perhaps he is gay or bi?... though as a dare, one of our male friends kissed him on the cheek and he freaked out and went to wash his face several times... and he does have a girlfriend, (but I see him more than she does)... just last week we had a little party, just us and 2 other friends, and ended up getting really drunk together. During this, we were "arm-in-arm" most of the time and were continuously touching each other throughout the nigh, he kept holding my hand and we even almost kissed a couple times; also, whenever we sat down he put his arms back around me, with my head on his chest or shoulder and we just snuggled. later, when we were sitting on a couch, he put his leg over my thigh and in between my legs then grabbed my hand,locked our fingers, and put his other hand on top and was just staring into my eyes. Sometimes though... when I got close to him or something, then he backed away or laughed and said "dude this is type homo!"... we share everything, we tell each other every aspect of our lives and personal thoughts, and in GREAT detail! but should I talk to him about this??? with girls I have this policy... "i would not date a friend" because if it doesn't work out then it may ruin a good friendship, plus, I consider myself straight; because he is the only guy that I have felt this way about!... so should we/can we even be together??? is this normal!??? "Alguien que me lo diga!". . .