Are we over?

Ive been with my boyfriend for 3 years. We are both inbour mid 20s. Our jobs can be stressful but we get threw them. We use to have sex 4 or 5 times a week. We would but initiate it and were both passionate about it. But in the last 6 months I dont know what happened. He use to be ao quick and the one who always wanted to get frisky no matter where or when. But now he doesnt try or care to. If I play with him or touch him he tells me he doesnt feel good or is tired. Trust me ive had the talk with him several times about how it makes me feel unwanted and reject it. I ask him if its me or if im doing something wrong so I can change whats going on. He just replies with nothing wrong but his actions remain the same.

Ill take it back a few when we first started dating I caught him texting girls n asking for nudes. I called him out on it and said he would stopped but continued anyways . I found wind of it again and I told him about it. He doesnt see how or why im paranoid about myself when that was in the "past" though he did it for close to a yea behind my back. I know I know I should of left him when I still had the will. He had to get rid of all his social networks because he could just not stop. Then he moved on to porn. Hiding porn or watching porn while im in the other room not caring. Keep in mind at this point im throwing myself n hes rejecting me beacause of all his bs problems. But he has no problem watching porn for N hr to three and be completely energized. I feel ugly and no longrr throw myself on him. We get into fights over it because he says he doesnt deny me. In the last 4 months we had sex twice. But I feel like ive asked for too much. I told him I wasnt going to initiate anything anymore. What upsets me more he put this front around his friends n people that he is freaky n has sex all the time with me when we cllearly dont. My bday and valentines has passed n who wouldnt mind sexy time. Apperantly him... I sit in bed while hes in the living room and nope nothing. He decided todah that now he is honrny. .. im sure from watching porn and comes into the room. Buuuuut lucky me now its to late n its that time of the month. Perfect. Im not a jerk I gave him oral and he came ....and left to the other room with out saying a word right after... I dont know if im just thinking like a girl or if others would take this the same way as myself.

Any advice? Should I give up on it?

Sorry for the rant.