Husband says he has low libido but then I catch him jerking off all the time… what could it be??

Husband says he has low libido and no sex drive… so we don’t have sex although I’m the one that wants it. He’s not even old, I’m 7 years younger. Yet I’ve caught him masterbating in the shower several times.. he says it’s not me.. (I’m 5.5 at 130 lbs and just had a baby) I feel like it’s me.. what can I do about this?

A little about us, we met 2 years ago, married 1 year ago, had our little baby 7 months ago.. and it seems like we’re already in the no sex stage.. what can I do to make things right?

Ps I told him are we going to have sex at all, he shrugged and said sure, and I asked for peace of mind would you rather cut off sex completely or have sex? He said I rather not.

Thanks everyone!!

UPDATE:

we spoke more on the subject last night. Again, I didn’t make it seem like he’s doing anything wrong because I didn’t want to stress him out. He still opted for no sex. I sweetly told him ok and I won’t press him on the subject anymore, but he can’t all of a sudden try to have sex with me because it’s an auto no. I explained that my love for him isn’t because of sex it’s his mind (true) that I fell in love with. I explained I always will think hes handsome and It will suck not having sex but if that’s his wish and he’s happier without sex than I’m on board. He explained that I mustn’t touch myself, I said ok. And I said your body is your body if you’re going to jerk it off he can, but I explained try to do it when I don’t know about it because it hurts to know he rather not touch me. He said ok I’ll do that.

Update: he is not gay! He had a huge Boner the day he met me just by looking at me. When I got pregnant he gained more weight than I did, he used to workout a lot and at that time we used to have sex a lot, with the decline in workouts and incline in weight I’m thinking he’s uncomfortable with his image (low self esteem). All by himself he has booked a doctors appointment to seek help, I didn’t push him or even give the idea to do it. He also has stopped jerking off.

I DID NOT MARRY HIM for sex and will not divorce him for the lack of sex. I married for richer or poorer in sickness and in health, does no one have these values anymore?

What if the poor guy has thyroid cancer (thyroid regulates hormones) and I divorce him for lack of sex? Kind of effed up