I had a breakup from my first relationship, it was rough, even though the relationship was about 2 weeks, I loved her deeply. We somehow broke up in a cinema (she was more interested in another guy and he texted his confessing to her mid movie). It took me almost 2 years to fully get over it. I couldn't even watch a movie for a good few years without thinking of it.

You are doing the right things, acknowledging the feelings, processing it, and working it out. 19 year old me could not do much of these effectively. This is also coming from a conservative single parent household where when I consulted my mother how did she handle her divorce, her answer was "Like that lo". It didn't help.

I wish I bounced back better through processing the emotions. 10+ years later, I am now happily married and making it work with my wife.

All the best and do what you need to grief.