Infidelity Support Group
Any relationship in which one partner engages willfully in sexual relations with another outside of the partnership is considered to have experienced infidelity. This breach of trust is often traumatizing for the faithful partner as well as the relationship, and support is often needed to heal emotionally and to decide whether or not the relationship should continue after...
Bottom line is that he does not seem to have the character or emotional maturity to sustain a lifelong relationship.
Many people just aren't suitable partners or spouses and this is no fault of your own. He's not worth chasing and likely not worth taking back regardless.
I know you say that you love him, but you deserve better than him.