Boyfriends diminishing libido

I've been with my boyfriend for 7 months. For the first 4-5 months we were very sexually active, 4 - 6 times a day. I think we were both a bit starved of sex for a while so I expected it to calm down a bit eventually and it did to around 2 times a day, which is fine. However In the last month when we've been together we've only had sex every other day.

We live a bit of a distance away from each other so only see each other for 2-3 days every 2 weeks.

Last week we spent 4 days together and we talked about it. He told me that he's had very little interest in sex for the last 2 months. He still gets very hard and still cums when we do have sex but he told me that lately he's always tired and not as interested in sex as he used to be and it bothers him. It bothers me too because it makes me feel less attractive but he's assured that is not the reason. He also gets head spins when he comes which is a bit concerning.

I think it could be stress related due to the fact that he changed jobs about 3 months and the market he's in has been very slow since he moved due to the holiday period. He's not earning a lot at the moment and it's very difficult for him. This is not a problem for me because I don't care what he earns and I earn enough for both of us but I think it may be a problem for him.

Could this be related to his loss of libido and if so, what can I do to help, if anything? I'm a bit scared and I'm not as confident as I used to be that he's as into me as he was 5 months ago but I'm still as into him, even more so and I don't know how to handle this situation.

Has anyone been through this kind of thing before and if so, any advice you have is extremely welcome.

Thanks.
JoJo.