The Pain of a Forbidden Love

Assalamu alaykum. I want to share something heavy on my heart. A couple of months ago, I was in a relationship that wasn't halal. It ended against my will, and not in a good way. We were together for maybe three months, but it feels like I'll be hurting long after. I've tried everything to move on-praying tahajjud until Fajr every night, pushing myself at the gym, even joining a wrestling club, getting my driver's license, and looking for work. But I'm still shattered. The mental pain is constant, and my anxiety spikes whenever I think of her or our memories. I can't even go to certain places without being reminded of her. Lately, I've been breaking down mentally, even having thoughts of not wanting to live. I've lost my drive for everything, and worst of all, I feel my iman slipping, which terrifies me. It's like I can't escape this, and I'm starting to think something is wrong with me. Please make dua for me.