<human>: Hi guys

I've been together with my boyfriend since high school. In May we will be together for 4 years. He recently announced to me that he will follow a summer school in Manchester in july this year, which results in him leaving the country for one month. In that month I will also get double jaw surgery that has already been planned for half a year.

At first I was devastated, I still am. The only time we've been apart that long was when we were together for 2 months. Also I feel like he is leaving me alone during my surgery, which results in me having to stay indoors for one month. Overall I feel left alone, our relationship is doing great but I don't know how I will handle not seeing him for one month as I can't come and visit him. And maybe I'm a little scared of him not being faithful after not having sex that long. Off course I also want the best for him.

Do you guys have any tips on how to deal with this? Any experiences? Thanks!

Condense the text into a few key points
<bot>: Boyfriend is leaving to study abroad for one month during my double jaw surgery/recovery. I'm having a hard time dealing with him leaving, feeling anxious. Any tips on how to deal with this? Or experiences?