Yes, sex is very bonding. If your partner is not bonding with you, this abuse, it's rape! STOP all connections with this person, walk away.
You most likely encountered a narcissist. There is no BONDING with these characters
It's abuse! GET OUT NOW!!!
SEX IS A VERY DEEP INTIMACY TO BE ONLY SHARED WITH SOMEONE THAT RESPECTS, cares about you, honors, protects, and only want to share this with you!!