My ex girlfriend (who broke up with me after a 3 year long relationship) wants to have sex with me after being apart for 1 month now, should I do this? And IF she's ready for a relationship again she doesn't know if it will be ME or someone else. Can I get my ex back by having sex. Are you now engaged in a purely sexual relationship with your ex? Separation When you realize my ex only wants sex, it's tough to know how to react.