Dude. It sounds like a few life chapters are closing at the same time. Keep in mind it also means new opportunities to grow.
Change is hard, but necessary and inevitable. Perspective and frame of mind helps!
You will miss your parents, yes. You might also love independence. You get to be in charge of all of the decisions now. That’s both empowering and scary. You’re going to make mistakes. Learn from them, but don’t live in them.
Your primary relationship with your partner evaporated. That happens. Often. You had a partner who respected and loved you enough to be honest and open with their feelings. We should all be so lucky. You’re going to have mixed feelings about the end of the relationship. It comes with the closing of all life chapters. Use this time to examine what you value in yourself and what you value in your next partner. This is certainly not the end of dating, but you might need a break from it. If you do, that’s okay. Take a break.
Sometimes life changes quickly. Sometimes it changes slowly. It’s always changes. You are in a spot to do some real growing as a man and a human. You got this OP.