Virginity Attachment

Okay, so i’ve been with my boyfriend for about a year now. I lost my virginity to him in May and before I always used to hear about the “attachment” that comes with having sex or losing your virginity. I thought it was a myth but honestly.. i feel so clingy. I’m always in tears when we have to say goodbye (we’re in a long distance relationship), i always want to be talking to him and i just get into such bad moods where i cry when i can’t talk to him or when he has to go to sleep. I know i’m overreacting but i just want to know if it’s normal. or what’s happening !! thank you