You're processing. That takes time. I still get those twinges of memory, and it's been almost two years since I left my ex.
I think you're doing a lot of really smart things for your healing. This post was one of them.
Good luck with your schoolwork. I remember how hectic this time of year is with everything coming due and all the exams. Good luck with everything. Do you have any plans to relax and treat yourself after the semester ends?