First off, I have to applaud you on the fact that you don't care about repercussions and issues and all those other silly excuses people tend to make because they are too afraid to take any risks in life. The fact is you want this guy in the sack and here is how to do it . . .
Go out for drinks. Afterward make him come over to your house: Tell him you have a mouse you need help getting rid of or a leaky faucet or some such pretext. Once inside, get real close to him and kiss him and don't let go. The rest should take care of itself.
Note: If the guy is gay, which is possible, you may be out of luck. In that case, look for a new best friend to seduce.