Background info:

I'm a 16 year old male. Note that severe depression and anxiety does run in my family unfortunately.

I have battled with anxiety and paranoia a lot in the past but not really depression.

My story starts when me and my cousin take a trip to Missouri to see family I rarely get to see, like every other year at family reunions. The first few days where great, I had a good time with my family and everything was going fine. Then we spend the night with my mother's cousin's family. They have a daughter that I have never met before named Alex. We hit it off immediately we had the same interests and loved the same things and did the same things. It was really weird to me because I have never related with a girl so much before, I only spent two days at her house and I became very, very attached to her. You could say I kinda fell in love with her. However, I knew she was apart of my family which literally tore me apart. After spending two days with her I had to leave to go home, this literally destroyed me, knowing that I wouldn't see her for at least another year at the next family reunion. She promised she'd go to the next one. Every time i think about it i literally break down crying. After i've came home it's what has been on my mind 24/7 and i've been in such mental pain its driving me insane. I'm scared to tell my family about this because I don't want to tell them I fell in love with a family member which is really weird and I dont know how they would react. I've just felt so alone and in pain all the time, it's hard to get out of bed and i've lost the drive to do things I used to enjoy. I need advice on how to get over his because school starts in less than a week for me and I do not want to be dealing with this while schools going on. Can someone please help me?!