We were involved with each other along time ago and recently got involved again

I dated a guy years ago for about a year and we broke up because he started cheating on me when my son was diagnosed with cancer at 3 yrs old.. he said i wasnt there for him. Lucky for me, his family (mom.sister & her family) were close to me at the time and they all were there to keep me focused on my son and not dwell on him cheating on me and breaking up with me. Since then, his family has stayed in touch with my son and me and we get invited every year since then to their families mothers day get together and also their Holloween Party that is huge. It has taken alot of work, but I finally was able to become friends with this guy with out any bad feeling etc about 8 yrs ago, and him and I have always kinda still had a thing for each other but i didnt trust him and wouldnt let it go anywhere. Then about 2 yrs ago i moved out of state and recently moved back to CA where i lived originally. Im moved back around Aug 1, 13 and couldnt find an apt and was running out of money, so i called this guy out of the blue because I had had his number and didnt know who else to call.He has been letting me stay there a few nites a week since then and the sex is great BUT he is keeping me at a distance as a friend.And he only lets me come over when he gets home from work about 2 am and then he calls me and he says i have to leave when he does. The nites Im not at this house I sometimes stay in a hotel or sleep in my car because I work but dont make enough to get my own place. Meanwhile he is telling me he cares for me and really likes me but that he has been single along time and wasnt ready for a relationship and also the reason for him not letting me have a key the nites hes is planning to see me ,after he gets home, is because he says hes not sure if he is ready to do it cus hes been alone along time and he likes his privacy. I am having a hard time believing him. because he is secretive and he also makes sure that everytime I leave his house, that i dont leave ANYTHING of mine there. I mean anything.,,,food, bandaid or whatever. SO i think he is hiding something, even tho he keeps telling me its only cus hes been alone along time and like its.,..But I know that there is someone else (female) that goes over ther but i dont know much more...and he keeps things secretive. And weekends hes not around, he says hes with his family and mom..which idont completely believe either,even tho they are a close family.. SO I want to know what you think because im think i need to walk away because I think if he cares like he says that he would be giving me alittle more freedom regarding his house and also he would be acting different and treating me different. I tried to tell him that but he always comes up with a reason and blames me for whatever the reason is.So should i walk away ior what. I also think that he thinks I need him so he can treat me the way he wants. HELP

This has about a 5 percent chance of getting any better. Love yourself enough to know that he has you as a booty call that believes his bullcrap. He is not straight, not boyfriend material, and now that you know what you are looking at you need to gracefully walk away with your dignity, cause if you don't your hurt will be no ones fault but yours. This situation is common and can be less hurtful and instead a learned experience for you if you take the actions to walk away nicely.