need advice

Ok so yesterday was my birthday and the night before I was just curious why my husband always takes hours in the bathroom and when he came to bed he didn't even tell me good night or he loved me. He acts so cold with me which had me wondering why? Why does he act the way he does and why doesn't he show me love or affection he even avoids sitting or sleeping with me. I've had this unsteady feeling for way to long now and I just never get any answers from him never. He use to treat me like a queen took care of my every need was attentive now I get nothing it's like he dispises me. And when I tell him I need him he says I'm selfish it's all about me. And yes it is he married me he should want to make me happy what is wrong with that? Indon't understand what went wrong. Well going back like I was saying. I've been curious and wondering why he acts the way he does he never gives me an explanation when I talk to him he ignores me. I don't understandstand why. I have this bad gut feeling there's something more and he's not telling me but when I ask he doesn't give me any sort of explanation. Well anyway last night I went threw his phone & saw he has this app sort of like Facebook but it's porn I'm discusted with what i saw. I feel betrayed I though I was the only girl he desired or only wanted to be with. But then again who am i fooling. He never wants have sex anymore I have to pretty much beg him for some its horrible and degrading to feel like your not enough or not attractive enough. I don't know why he's being this way he would treat me like a queen and now I'm lucky if he even talks to me when he gets home. I also noticed he works a lot more then usual now he use to have a set schedule but now he comes home really late and different hours he doesn't respect me anymore it hurt it all hurts bcs our little girls adore him and he doesn't seem to give a danm about me or them anymore. I'm so lost I don't know what to do. I'm considering a divorce. I ask him if he's not happy to tell me but he doesn't ever have time to talk he's always tired and just tells me to leave him alone he's like a totally different person he's a jerk to me. I don't deserve this I deserve better. I told him we should consider counseling and he said we just need to be better with each other. But he doesn't try at all. He didn't even wish me a happy birthday he got me flowers & balloons but that was it. Didn't even wish me a happy birthday or called me. We had made plans to go out to dinner for my birthday but since I found all that porn stuff on his phone plans changed and he didn't apologize about it or nothing didn't even feel bad. I don't understand what I'm doing wrong. I couldn't even sleep it's the worst birthday of my life. To think that everything is falling apart and you can't do anything about it. I need some help I just want to desapire or go far far away I don't know how I'm going to do if we get divorced I can't be a single mom I haven't worked a day since I got pregnant with my oldest and she 4. I don't have a job or car and what if he tries taking the girls from me. I need some advice on how to overcome this and to see that it's not the end of the world.