Is this normal? Why do I feel like this

Hello everybody, im a 19yr old female and I struggle with audhd, depression and anxiety and recently its really been beating me up.

I have been staying with my boyfriend for weeks on end and the second I get home I cant function, I can't sleep, I cant eat, my thoughts start running but not only that, I hate leaving my bfs house, its more than just "awe im gonna miss you and it makes me saddd" its more it feels like its the end of world, I feel like hes ACTUALLY leaving me, I cry and get angry, ill ask him if hes going to leave me and if he hates me and I dont understand why. Its a shitty feeling cause I love being at home in my own space with my own cats but I physically cant leave my boyfriend. Im sorry if this doesnt sound major but I hate feeling like its the end of the world when were apart