I'm starting to understand isolation

I (27F) have been slowly isolating myself over the past 2 years. I prefer isolation over being around people as I'm a very empathetic person and I can literally feel everyone's emotions. Lately, I've been getting really depressed and wanting to harm myself. I found out about my ex boyfriend's (40M) addiction to 🌽 and it's really hurting my heart. We talked about this last Friday and then this Friday he was downloading pictures again. I'm just giving up and I'm starting to really understand the benefits of being isolated.