I agree w/woundedfool on what may be affecting his performance. If he is truly in mlc, any type of depression can and will affect his performance. He may say he's not attracted to you or he feels numb.
At this time, do not try to suggest and/or discuss his performance issues w/him for he will withdraw from you. He's got to figure out for himself what he needs to do to fix his issues.
Also, don't swing the fence gate too far...but start out w/something small like a touch or show interest in something he likes to do. If you truly want him back into your life, you will need to treat him as a friend and go from there. Friendship takes a while, so you'll need to dig deeper for patience. Go back and re-read some of reachingHigher's or ForeverYoung's postings.