Sexual Abuse Support Group
Sexual abuse is a relative cultural term used to describe sexual relations and behavior between two or more parties which are considered criminally and/or morally offensive. Different types of sexual abuse involve: Non-consensual, forced physical sexual behavior such as rape, incest or sexual assault, or psychological forms of abuse, such as verbal sexual behavior or...

There is also a page with survivor stories: https://www.rainn.org/survivorseries
Some people have very unique skills in manipulating others, and especially those with a good heart. If it feels like abuse or wrong to you, then it is! There is bonding in intimacy, and it is therefore extra concerning when someone who has rejected a relationship with you is pushing past your boundaries, ignoring your distress, and seeking "supply". Aside from professional help, you may consider moving, so he does not have access to you so easily.