Does your man have a lower libido?

Okay ladies... Please tell me I'm not alone in this, I need advice.....

So my man and I have a bit of an age difference (& this might be the root of the issue here) - I'm about to turn 26 & he turned 36 this year. If it were up to me, we'd be having sex probably 2-3 times a week MINIMUM. It's not just that I have a high sex drive, but I also just love "being with" my man, being intimate physically... And also I'm only 25 and enjoy sex, lol.

But pretty much since we've been together, and especially in the past 5 or 6 months maybe, our ideas of a satisfying sex life are very different. It's dropped off too. He rarely seems to want to have sex, and when he does, it's been pretty quick, boring, and leaves me unsatisfied. I think a big part of the issue is twofold: 1) he's at the age where libido/testosterone is dropping, so he's just not as into it as the younger folk, 2) he put on quite a bit of weight (which I think he's a little self conscious about, but it doesn't matter to me) last year after getting better from CHS & has recently (a couple months ago) started a new factory job that is fairly physically taxing - so even though he gets off work by 3:30 & only works weekdays, he seems to be continuously sore & tired & without a desire to do much of anything even now after 2.5 months of the job.

We've been together @ 2 years and live together. The rest of our relationship is AMAZING & we both could not be happier with each other (we both feel we got so lucky... He's really incredible) - and we snuggle & such all the time, so we're not physically distant at all... There doesn't seem to be anything else about our relationship or me that has been causing the low desire to be sexual, just what I've mentioned...

I am and try to be very patient and understanding, and I totally get that he may be tired or sore or such often - and I give him back rubs & such & try to take care of extra things. But I don't know what to do & feel like I'm going crazy wishing for sex all the time when I'm normally not even someone with crazy libido. And it's hard to feel rejected like that over and over and over again every day almost. I'm afraid it will start impacting our relationship in other ways. He knows when I want to have sex - I've tried everything on the spectrum between being subtly seductive/flirty to outright (sorry for the graphic) randomly sucking his d**k... which he enjoys but then it doesn't lead anywhere. If I'm really lucky, we'll have sex maybe 3 times in a month lately (most times of which end up being a short, lazy bang where I don't even get to finish during); but I ideally wish we were getting busy (or at least having some kind of sexual interaction) at least every other day on an average week.

What do I do? When I've tried talking to him about it, it seems like it just makes things worse because then he feels bad that he's not "keeping me satisfied", no matter how gently I approach the issue & try to make it more about what can *I* do to help us meet in the middle. But nothing else seems to work either. I just want us to have a mutually satisfying sex life. It's not that he doesn't want to I guess... There's just always an excuse (whether valid or not) no matter what time/circumstances/method I try. Basically every time, & that's not just an exaggeration.

Would it be worth it to look into the testosterone thing? Has anyone found any ideas or supplements or anything else that might help either/both increasing energy &/or boosting libido?? I'm at a loss and I don't know where to go from here. I never thought this would be an issue for me, but here we are...