I have a gay man crush what do I do?

I am 18 years old and have known this man for a long time now. It started when I was a freshman in high school and he was a junior. I was introduced to him by my friend. To sum it up, he was and still is my only man crush. I became curious with him. His personality is a great mix. He is very intelligent, he is political and he is incredibly perverted with being funny about it. We got to know each other over time and I started noticing his body, I mean people might watch gay porn and be straight. But this isn't porn. Its a genuine sexual attraction I have with him. His face is just rugged but yet so sensitive and soft at the same time. His long hair, I love the way he smells, I got hard over this bulge he had in his pants when I seen him at a party and also hes got the best butt from any male I've seen. he graduated in 2009 and we still kept in touch. In my senior year I still thought about him. We facebooked each other and I told him how I felt about him all these years. It turns out he is bisexual and even said throughout our time knowing each other. He said I was very cute and he too had some sexual feelings with me. We dated 3 months ago, but I was very shy about it. I was not ready for homosexual dating in public. So I told him, im not ready for him yet. He said understood and he was willing to date me again when I am truly ready. Currently my feelings for him get stringer. I wanna feel him, taste him and overall just wanna get in him(sorry I went over board) but yeah he is 21 now and since im 18 we are consenting adults. Should I just give in to him? I define myself as bisexual and am afraid I will never get laid with a woman if I really get into this guy. But I simply can't help myself he is a sexy man.