Struggling to cope with a recent breakup and losing my best friend

I completely understand that. I'm so sorry you're going through this. My ex broke up with me five months ago which I still can't understand why. He supported me through everything and was very understanding of my mental problems and trauma. He was the reason I was feeling more confident and started taking care of myself more. Even though our time together was quite short, I still think of him sometime. I loved him so much, he was almost the best man I dated, but no one is perfect and people always change. And even with everything I said, he had his flaws and problems as well, and he was never willing to communicate with me throughout the relationship. I guess he wasn't feeling the same. One day you're so close with someone you feel like nothing could go wrong, but then the next day they can act like you don't even exist in their world. It's a sad reality especially for people like me who struggle with attachment issues. My advise is that if you want to move on, please cut off contact with your ex and try to hang out more with your friends/family if it's possible. Don't get too stuck on the past, I know how it is and I still sometimes relive my memories with my ex. Just remember that time will help you heal, and hopefully one day you'll be able to find someone else. I wish you the best.