Anyone else feel this way in a relationship?

Keisha • I am 26 years old Snapchat: keishahardy1997 I don’t have the premium account

My fiancé and I don’t live together yet we live in separate apartments for now we plan on moving in together in November and we’ll be together for a year in December this year... but everytime I stay the night with him for a week and when its time for me to go home to my apartment I end up crying because I miss him and I don’t want him to go and the long distance is really hard on me and I end up getting depressed for 2 to 3 days because when he leaves it just feels like a break up even though it’s not and I end up feeling so alone and sad