Relationship struggling with boyfriends long hours

I have been with my boyfriend for 2 ½ years now. My boyfriend is a chef so has to work very long hours and often shift work. Lately I have been finding it more difficult and been feeling very lonely. I have a few close friends who I usually see twice a week which is good but they are all in relationships too so I find a lot of the time when I am alone they are busy with their boyfriends. I find weekends particularly hard. He has 2 days off a week which are usually week days so I am working during the day. I see him one night but the other he sees his friends. I sometimes see him after work on the weekends but we are both tired so not always the best time to catch up. The other pain is we barely get time to talk when we are apart as I am working days and he works nights. I feel like we are drifting apart because we never get to talk. A lot of the time I feel like I am waiting around for him as we have to plan when we see each other on when he has days off. I have told him how I am feeling a few times but he then feels guilty and like he is not making me happy and I don’t want to push him away by constantly bringing this up. I am really struggling with this I find myself crying a lot of the time when I think about it I miss him all the time and I just don’t know how I am going to get past this. Help and advice needed please?