My bf waits till I fall asleep & he gets on dating/porn sites instead of having relations with me?

How do I keep my peace of mind when my bf barely has anything to do with me instead he waits till I fall asleep and he gets on all these personal profiles, ONLINE DATING & FREINDS WITH BENEFITS sites. I have asked him to stop (he said he would only go to porn) and the next morning there are more sites. I don't mind watching porn but friendfinder sites - to me- are like cheating. I take care of all his needs in bed and out, but he is NOT taking care of my needs. I do not understand why he takes care of himself in front of the computer instead of having me? This hurts my feelings and it is making me fall out of love with him. I am no longer happy and it is affecting my everyday life. I JUST WANT TO BE HAPPY!