I'm sorry for the situation you are in, heartbreak is never an easy experience. I
t's hard now because its raw and new and you are in a 'mourning' phase at the moment. I've been there where you obsess over what they are doing, what went wrong and see if you could have done anything different, its not healthy.
Find healthy coping mechanisms, I always say, don't look at there social media, get rid of any belongings you have, get rid of pictures, you gotta think of yourself now OP, getting through to the other side so you don't live in sadness.
I know people usually say there's 'plenty more fish' and you may not like that line, but once you have gone through this experience, you can analyze this to see what went right and wrong, it can be a learning experience for yourself, so if you do ever meet someone else, you go into it a bit more wise.
Plus, you get to go through the exciting experience of meeting someone new and getting to know someone for the first time, which I believe is the most exciting bit.
I have been in many relationships (I'm not a whore by the way lol) even some that were years long.
Do I regret any of them (well maybe yeah lol) no but seriously, there's things I could have done better, things I couldn't and things they could and couldn't have done better, but you can't live in regret man, its all about learning.
Its time to re discover yourself OP, who YOU are and what you want now. The future is still there GRAB IT!