I already know i'm going to get shit on, and probably will just be reconfirming exactly what i'm doing but need some advice still.

So, I've been in a LTR with this girl for 5 years, our 5 year anniversary is on december 3rd. basically, the last few months have been rough, and we've been arguing and fighting a lot. We "broke up" like 2 times, which didn't last more than a day or two and porbably just happened because she is very emotional. But, she basically told me it wouldn't work and I went to her house to talk and she wasn't very receptive. Shes definetely mad at me, and isn't being sweet. We were eachothers first lovers, first major relationship, we lost virignity to eachother, and have been a major part in eachothers lives. I know in TRP community this is looked down upon and people will just tell me to no contact and move on. I know also, that there is no unicorns, and my oneitis is making it hard to let go of this one. I gennuinely want to make it work though. I guess my biggest question is this..

It's been about 5 days since i last messeged her on FB like a bitch telling her i'd change, and I love her and miss her, etc... after that, I stopped messaging her because I had sent about 10 messages that got read and didn't get a reply.

What should I do? This girl is heavily invested in my emotionally. Its hurting me too, but im being strong.