What do you do if your partner resents you ?

Relationships feel good but not when you and the person you’re with aren’t getting along well and feel lost. I know he loves me because I see him trying but at the same time I know there is a bit of resentment there from him. Arguments and grown frustration over the years. He says that it’s not and tells me nothing is wrong, but his actions don’t agree. His patience is low, he talks to me with short answers, and only talks to me about surface things Like his job and nothing else. It seems I’m just trying to make some sort of connection with him and failing. He’s getting frustrated thinking I don’t know him when I’m just confused about how to get things back on track. But it seems he’s feeling confused and wondering if it’s worth it. We’ve been on a rollercoaster for a few months and I just feel I’m not good at communicating or getting him to understand me. And at this point, I just want to know suggestions on what we can do or I can do to start mending our relationship. A male friend told me its best not to talk about my feelings at all but that seems strange to me. What do you ladies think ?