Boyfriend moving to university

My boyfriend goes back to university tomorrow and I’m so upset. It’s not far from where I live but we never get to see each other. He always picks his uni friends over me. He’s constantly getting drunk. I hate it when he goes out. I trust him 1000% but it just makes me uncomfortable. His flat friends (girls) are really touchy feely with him which makes me uncomfortable. He always used to spend his time with me before he started uni but now he never bothers. I get bad anxiety when he’s away and over think everything. He’s not very supportive and gets angry when I get upset over this. He’s the love of my life and after 5 years I’m still head over heels. What should I do to help my stop feeling like this?