sex drive

Please dont judge harshly I just need to vent. Me and my bf have been together for 4 years we used to have a lot of sex and we would always experiment and act crazy, well for like 2 years now I alost never wanna have sex. I feel so shitty for constantly denying him or telling him to watch porn. He always everyday wants to have sex multiple times a day and when I say no he gets so upset and will say "I just wish my girlfriend wanted to have sex with me" and I feel so bad because I like masturbating and our sex is great but I just dont FEEL like it. I feel like he takes a longer time than I want and Ive told him and I CANNOT get wet anymore and we have used lube but I just have no drive to have sex. I just feel so shitty and tired all the time I am the only one that works and when I get home and night and hes done nothing but game all day I get even more discouraged from having sex with him because I have to do laundry and clean and stuff so the house isnt destroyed when I go to work. We are so in love this is our only problem and we cope pretty well its just I feel shitty about it