u/Flat-Negotiation-951

I dated a guy for awhile-some of the best and worst times I’ve had while dating. He slowly turned into someone I don’t even recognize and I tried my best to make it work, but ended in a big blow out and I feel like the sadness won’t ever stop. Please help me with some advice/motivating words/support-it’s been awhile since we actually talked.
I feel like my chest hurts and it won’t stop. I can’t stop crying. I need some guidance please.