What is going on here?

Ten years we are friends,he comes on to me a lot,I keep saying no because I love him and he doesn't seem to want to commit.I get all proud and act like an and distance myself from him.In fairness,he stays my friend.On social occasions I always talk to him though and we get on well.Two months ago we are out and he is ignoring me.I ask him why (gently),he goes beserk andsays I always blamehim.He wont talk to me for weeks.Another social event..we get on fine talk and laugh,then as I am talking about another woman,he out of the blue starts saying she is better looking,better body etc.,in front of all our friends.I say,why did yousay that,you know I love you.He says, say that to me in work,come and say that to me then.We have both expressed feelings for each other,but only on social occasions.There is tension there still,I don't know if he was dumping me or telling me to come on.Another social event is coming up and he is not going.We wont c each othr for three months.Help?