My boyfriend is on vacation and I miss him so much and I just can’t stop crying and I feel like when he gets back in 8 days we will be okay but I just don’t know how to stay positive?

You can get through this! Surely there are plenty of things you liked to do before you met your boyfriend. Just pick up one of those activities or start a new one. Call a friend and let them know you're a little lonely. Savor the you-time. Take a relaxing bath. Read a book. Paint your nails in an elaborate design. Watch a movie or show that isn't quite his style. Listen to some music you haven't heard in a while. Take some creative photos in nature. Cultivate something interesting and new to share with him when he's back home with you.

This concerns me because this is an extremely emotional response to only a short time of absence. Your boyfriend should be an asset to your world but not your entire world. In healthy relationships both parties should be able to have a life outside of the relationship. You and your boyfriend should have friends, hobbies, interest, ect. that you have outside of each other. If your boyfriend going on vacation causes this much emotional distress it's time to look inward. What are you doing to fill your time without him? Do you have hobbies? Do you have close friends? If the answer is no, then you need to find activities and people who interest and fulfill you. Interesting people have interests. Find things you like outside your boyfriend. Then the next time he goes on vacation you won't be counting down the days to his return.