Not sure what to do

Ok so this might be long but I need help on figuring out what to do. So my husband has a friend that is a girl. I don’t believe anything is going on between them sexually but then again you never know. Anyways so he will go to her house almost everyday and spend hours there while I’m home alone with our daughter who is now almost 11 months old. I get so angry at him for being gone and we get into fights about it. It’s been about 2 months since we had sex and it’s just cause We get so mad at each other we don’t even wanna touch. I feel like he doesn’t want to be with me and our daughter. And now he believes I don’t even wanna be with him. Idk what do to anymore. I shouldn’t feel like a single parent when I’m married and he doesn’t understand why I’m so mad