I (21F) have always struggled with intense anxiety, especially at parties and family gatherings. This summer my dad planned a 4 day long camping trip where all of my extended family whom I haven’t seen since I was a child will be there. I will essentially be forced to interact and make small talk with all of these “strangers” who I haven’t seen or talked to since I was a child. At the same time, a couple days before the family reunion my boyfriend of two years will be moving back home where we will have to be doing long distance for the first time in our relationship. Both of these things have been giving me so much anxiety and I don’t know how to cope. I do not like my extended family, not only are they strangers to me but some male relatives are especially creepy and made me uncomfortable as a child. 
How do I cope with these inevitable situations? I’m so scared of the unsure and worst case scenarios of these situations are keeping me up at night. I haven’t been eating lately because of how bad my anxiety is getting. I’m afraid i’m too dependent on my boyfriend and i’m not sure with how i’m going to cope with long distance. 
Any advice would be appreciated.