@billiejean,
billiejean wrote:He is 24 and I am 42. Yes, I feel as if he raped me, but, then I participated. I feel so bad. I am crying uncontrollably.
Well, he did rape you. Whether or not you chose to participate later on is immaterial. Even if you take the view that as soon as a victim returns the sex and engages in it too it isn't rape (I personally think there should be a grace period of say, perhaps a week, before one considers someone to have settled down enough to make the decision rationally) it still was to begin with, and any later consent doesn't erase that.
While people have brought up concerns that if he did this to you, he may have done it to others, while it's a possibility there aren't any guarantees. You may be a circumstantial victim or he may have wanted to do it a while and used the mutual drunkenness as incentive, thinking you could both pretend to forget.