Feeling distant

I’m feeling so distant from my boyfriend. Before going away on vacation I told him I wanted to spend more time together. We only see each other on the weekends even though we live close and it’s always with his friends barely any alone time. Our sex life is like non existent but he says he’s happy and in love. Well I came back after being gone 10 days and he invited me out to drink with his friends but I told him I was tired and wanted to do something more relaxing and he told me that it had been awhile since he went out so he was going to go with them and see me the following day. I was really hurt and honestly we always go out and drink with his friends. I don’t know how I’m feeling but I feel like I’m in the background.