Help! My BF's Libido Is Dying!!

Me and my boyfriend have been together for 2 years now and we were a sexually active couple until around the middle of 2012. I remember we used to do roleplay and have sex from time to time, but now I can't even turn him on... I went to the store and I bought some short cut briefs the other day and he told me I looked sexy in them. I got him to even touch me in them, but it never really escalated much from there.

Is it possible that he loves me but the lust is gone? ... I ask that because he always tells me that he loves me and we always enjoy spending time together. He and I go on dates occassionally and we alternate the bill each time, so one week it's me and the other it's him. We've also spent time fantasizing about our future together (well, he's thought it out more than I have). Plus our relationship with each other's family has been pretty strong ... I'm well liked and he's well liked by my folks. So I don't really understand why sexual appetite vanished? Yet mine has actually become stronger in the long run.

Anywho, last note. He has been working a lot more since I've known him. He does directing work at the circus and travels with them every year. Come to think of it, the first time he went out of time was roughly the same time this happened. He was gone for about a month and ... it felt like a mental drain. I know he gets irritable when he's working and he doesn't have his spice bag to smoke, but that's not the reason for this...

I just finished reading about this. From what I gather, certain medications, low testosterone, masturbation, insecurity, medication, and stress can affect a man's libido. Stress seems to stem most from finances, work, or family. If you google libido in men, or he won't have sex with me you might find more in depth answers. It seems most are cure able or temporary.