Confused girlfriend

Here goes, I have been dating this guy for three years. I'm not sure what is going on but maybe I am paranoid or something. He uses his phone a lot when he's not around me like when he is at work lots of weird phone numbers either made to different places far away (other counties cities etc.) Any time he gets txt msgs when I am around he replies or checks his phone when I am not around. He has gotten onto a forum and checks out other girls profiles and when I asked about it he said that he was just looking at something she wrote. Which I believe is a lie because I went on that forum made a profile and the profile doesn't register unless you clicked to see their profile. He told me that he just clicked on her topic and it sent him to her profile, thats a crock a shit. Any weekend we have lately he don't talk with me wont acknowledge me, but will stay on internet talking to everyone else. Also we don't go places together very often. He also takes 30 min showers or longer locks the bathroom door sometimes. He tells me he wants to marry me, but I don't want to marry him if this is fortelling what my future may be like with him in the long run. I have been married and divorced once and not wanting to marry and divorce again. I am starting to feel like I am just some roommate to him and a fuck buddy. Feels so good to get that out. Anyone have any advice as to why I am so confused or opinions?

Hi DVLZANGEL, This doesn't sound good to be honest. Don't let yourself in this bad situation, you will end up losing your confidence and lose faith in your judgments. People are defined by their acts. Saying that he wants to marry you is one thing, but if the reality is so dark, maybe you should start thinking to turn the page and move on. Be strong and think of YOUR happiness first.