Husband doesn't last long so doesn't want to even try anymore :(

So hubby and I have been together for 5&1/2yrs. He's always had a problem with not lasting very long, but he recovers pretty quick so it wasn't a total loss. However as our relationship has progressed he is less and less interested in having sex, he never ever initiates it and says that it frustrates him that it happens almost immediately and gives him no pleasure, and once he recovers and we do it again it just doesn't really do anything for him. I've tried talking to him about it numerous times as it leaves me feeling really unwanted and rejected, especially when I try to initiate and just get pushed away. I'm also now pregnant with our first baby and as if my self esteem wasn't already pretty low I found porn on his phone history the other day and flipped out at him, it's bad enough that he doesn't want to have sex with me anymore but he's happy to watch strangers doing it and it really upset me! He said it frustrates the hell out of him that he can't last and is convinced that it must piss me off too so that's why he doesn't want to?! What can I do to help him and get our sexlife back? I'm sure that it was better in the beginning because we had sex more frequently so he'd last that little bit longer. I used to give him a blowjob first to get the inevitable over with before we had sex because if I didn't and he came inside me then when we tried again I'd lose all sensation, but now he doesn't even want me blowing him... help I am so frustrated!!!! :/