How to rebuild

So I’ve recently broke up with my boyfriend of 2 years. That was the longest relationship I’ve ever been in, it was a rollercoaster the whole way through. Our biggest issue was communication and I’ll take the blame in that area I’m not good with confrontation so I often shut down. Followed by both of us talking to other people throughout the relationship his reasons are unknown I’ll be honest and say mine was out of spite but the communication wasn’t as malicious as his. Doesn’t excuse the fact. Long story short those things I couldn’t get over or forgive and it constantly played over and over in my head leading me to resent him half the time and love him the other. So I decided there’s no use to string him along in my indecisiveness. Yes there are things I could have done better to work it out but I just couldn’t get over past issues. Now I feel completely lost and alone bc I’ve isolated myself from friends and family in the process of focusing on my relationships and making him feel comfortable. I’m in school hoping to get into an RN program in a few months , I’ve recently switched jobs and I feel like the breakup is a regret. I’m sure it’s just bc I’m lonely and no longer have that person I can go to so things have become hard emotionally and mentally. I’m trying to keep my head up and trust the healing process but it’s hard. Any suggestions on how to rebuild alone with so many transitions going on ? I write in a journal majority of the time but it’s not the same as gaining feedback or and encouragement. Learning to be an individual after be a couple for sometime is hard. Sorry if it’s jumbled.