Well have you talked specifically with this partner about this issue, is it one sided or does he feel the same and have different feelings about being sexual with you lately?
Has anything new happened in the relationship? Moves, new job, new partners, bad habit of him starting to really get on your nerves? Is something in their sexual interactions affecting you negatively? If you cant identify when it started or what it is, I'd suggest going to a counselor because
"if this can't be resolved I will have no choice but to leave." sounds like a very serious problem is going on. Lots of people have lower desires or disinterest in sex with a partner for (even extended) times but don't jump to the "I must leave" solution when most things in the relationship are good unless every avenue has been explored.
Happiness will never come to those who fail to appreciate what they already have.
Last edited by Anneintherain; 12-11-2012 at 09:17 AM.