need advice! no sex but porn?!

I am currently 7months pregnant so very emotional! Me and my boyfriend have not had sex in almost 3 months I've tried to talk to him about it because it honestly really upsets me he says it has nothing to do with me being pregnant and that he's still very attractive to me but rather that he has been feeling depressed. Lastnight I asked if he wanted to have sex.... we didn't and when he came up to bed I saw he had just watched porn! I'm honestly so upset and don't know what to do 😓