VLM, my bf also said my weight was a problem, but I've lost 30 lbs in the last eight months and it has made no difference.

Chances are the ED is the real obstacle. Suggest you read:

http://www.andrology.com/partnerofEDsufferer.htm

http://www.andrology.com/erectiledysfunction.htm

That whole site is very informative. My late husband also suffered from ED due to diabetes, and my reading has told me that this problem is VERY difficult to overcome. Even if drugs do help him, the psychological damage of his body "letting him down" for a long period of time is very hard to overcome. It seems to undermine or disconnect some basic agreement he has with his body that it is supposed to work in a certain way. It's a fundamental loss of something he has always relied on.

I don't think there is an equivalent experience for women unless it might possibly be (and I'm not a mom, so I don't know), trying and trying to conceive and feeling that your body has let you down and won't cooperate, or possible wanting desperately to breast feed your baby and again, somehow your body won't cooperate. People may tell you "this just happens" sometime, but you look around at everyone else who seems to be functioning just fine, and you might be angry, resentful, withdrawn, etc. For men the Penile Zone is so important and so private, that it is hard to discuss with anyone.

My late H even had the penile implant surgery (which is a horrible surgery to have voluntarily), but the whole sex zone was just very perilous for us and, frankly, we never made use of the good physical results.

I really don't have many answers about this... wish I did.