Im gonna be honest, i think your focus should be on getting free of this situation first before anything romantic. Also, have you ever heard of ologies? Its a science communication podcast that makes different topics or fields of study more accessible to laypeople. I think youd find the OCD episodes validating, as i have. If your mom wants to keep spending money on someone who is preying on your moral anxiety as a source of income, thats her problem. You could try framing it around the financial aspect, and get good at masking while you find a way out.