Don't know what else to do.....

I've been at odds with my husband pretty much since we got married 6 years ago. I would ask him to help me out and take care of something and later he would say he forgot or ran out of time when he had 4 hours to complete the task and didn't even start it. I've caught him multiple times having inappropriate conversations with random women online. No matter how I told him it hurt me, I would still catch him. He now says the sites have been deleted, we'll see. A little over 3 years ago my daughter was born and everything escalated. Before she was born i told him that i really needed his support. I was in labor 27 hours then sent for an emergency c-section. He spent most of those labor hours playing games on his computer, and was so disinterested in helping me push that my grandmother had to step in. Afterwards, he would say he needed to go let the dog outside and would be gone for 9-10 hours while we were in the hospital. After I went to back to work, he would try to get her to sleep all day so he could do who knows what. I've caught him in so many lies that I can't keep track anymore. And it could be lies about anything and everything. Household tasks, what was going on with my daughter through the day. So of course everything was getting worse day by day. Finally in july of 2015 I started doing some research and found that ADD matched up with a lot of his symptoms, some that I didn't notice sometimes. When I discussed the possibility with him, I was then informed that he was diagnosed with ADD as a child. I had no idea and he has lived with it untreated all this time. It took him 3 months from his appointment in 2015 to complete his testing because he continually missed appointments. After finally having a diagnosis on November, he waiting to get the prescription until December. He took one pill and said he didn't like it, but would get another kind. He finally makes an appointment for February and come to find out insurance won't pay for it. He waited until June to go back and get a new prescription. He just filled it on 8-5 because I did for him! That was 12 days ago. He has only taken 5 pills. I don't know what else to do?! I've tried so hard for the past 2 years to figure out why we aren't getting along, all the while trying to talk to him, find ways to help him remember, everything I can think of. I give him a list and he won't do it. So I get home and do it and he gets mad at me and says "I was going to do that, just leave it". I'm thinking, when? You've had all day and done nothing but now it's 8pm? So it still won't get done and the next day is the same, so on and so on. I end up doing it because it needs done but he's still irritated after 3 days of it not being able? I've put myself in counseling trying to cope with all this but I just can't help feeling like he doesn't care enough to actually try to repair our marriage. I'm not be any means perfect, but I'm trying. How many times can he tell me he's gonna try to make things better, and do nothing? It seems like he just tells me what I want to hear so I'll drop it. Then the next day it's the same stuff. If we make a decision together about our daughter, he will go behind my back and do whatever he feels like doing. It makes me feel like he has no respect for me and doesn't care about what's best for his daughter. I don't know how much more I can take.....