Ex Boyfriend

I met this guy when I was 16 and I fell madly in love with him. He was my first experience for just about everything, drinking , weed😁, sexual contact...and most importantly love. We've been fond of each other for 3 years , between those times he has left me for other girls but always finds his way back to me. I can't really explain why or how. But I have a close bond with him , a bond nobody can possibly break but he wants to come back , im guessing...not really sure. That means I'd be taking him back again and risking other opportunities for myself. Idk what to do this time 😔😔