How do I stop caring for someone I realized never cared for me.

I realized someone I opened up to in good faith and trust, and someone I developed feelings for. Although showing interest ( constant glances, alluding she was possibly interested in girls, complimenting my physique and me in general, etc). Never really cared. My feelings were a joke to her, and apparently something she shared even though she promised she wouldn’t). And as a demisexual, it takes me a long time to really find someone I connected with. She genuinely felt like the first safe and healthy person I’ve met in a long time. We confided in eachother.

But I soon realized I was used for validation, and I guess once she saw who she could pull, treated me and my interest in her as something that grossed her out. Even though she would want my attention. ATP I am at a loss. My self esteem is tanked, I find myself comparing myself to others and tempted to prove I’m desirable. But I just need to move on. She genuinely doesn’t care how she treated me. Yet she seemed so friendly and caring. If anyone has any advice. I would appreciate this.

I’m also trying to heal from previous toxic relationships and friendship losses as a result of these relationships. I genuinly feel alone. I can’t talk to family as they don’t know about it my sexuality. I have a therapist but can only afford to see her one a week or once every two weeks. Like I feel alone, and unsure how to cope with the mistreatment I’ve experienced. I’m not sure if it’s because I’m unattractive people think how they treat me doesn’t matter? But I’ve had girls approach me in person and when I was on dating apps I got matches. I wouldn’t say I’m a model, but this girl and her friend made me feel like I was undesirable.

I’m trying to glow up I guess, but the past few years have sucked out so much from me. And the past few months have been brutal. I really just want to heal.