What should i do or not do?(gay friendship)?

so i have this friend from high school bob. He started to talk to me(male) one day out of no were so i talk to him. but then i notice that he was always looking at me in cl. When i looked back he would turn away and look some were else...now lately he comes up to my desk out of no were to talk to me...he makes up the most stupid comments to keep the chatting going on. He haves this friend(female) who he took to prom.He even kissed her. So i ask my other friend if she was bobs girlfriend and my friend said no. that bob does not want a girlfriend so the last day of school i came into cl and he came up to me and told me "im going to miss you...you were the only nice guy in cl" and he gave me his E-mail...but the thing is that i think im in love with him......