What am I supposed to do??

What do I do when I try and try and TRY to let go of the trust issues I have, afraid that he's going to lie to me and sneak around, when every time I get close I find certain things said between him and a girl or he starts acting weird like he's hiding something? I love him so much and I try to make him happy by doing things to show that I care but after awhile I stopped because I get the feeling that somethings not right. I don't want to be the good GF he know is at home making sure the house is clean, he's fed, the dog is taken care of, and his laundry is done when he's acting like he IS sneaking around. We've talked about it and he swears he's not but it's been a couple months now since I stopped doing so much around the house and for him and I think it's starting to show in him a bit. He doesn't seem at all happy with me anymore. We don't have "our" nights like we used to where we'd watch a movie and eat dinner together. We don't spend hardly any quality time together at all. In my mind, being in a relationship with someone that you care about gives you the added perk of getting and giving affection and when I try and instigate the affection he gets overwhelmed because its too much for him. I would love to just have him lay next to me, put his arms around me and talk to me in the caring way he used to while giving me intermittent kisses for like 1/2 an hour. That would show me that he really cares about me and give the impression that he does in fact enjoy being around me and being with me. Sometimes all I can think of doing is crying when I feel like he doesnt care about me the way he says he does. and there have been a few times I've asked him to do something to show me how much he cares about me...nothing. He has yet to do anything. I feel such a deja'vu it's not even funny. I get more and more down every day feeling like I'm headed toward a road I've been on before. I never imagined it would be like this between us. I want him to talk to me so we can straighten things out and have a clean slate, but he says he doesn't have anything to say. So I'm left wondering what I'm supposed to do because I get the feeling that I'm losing him, but he won't talk to me.