Feeling overwhelmed with heartache

Today me and my partner ended our relationship because they have been questioning whether or not they can be in a long term relationship with a man. There are no hard feelings (besides an incredible amount of sadness) and I know this is for the best. I don’t have to live in uncertainty and I can find someone who feels the way I did about them about me. And they will be able to do some self reflection and difficult work without the pressure of a relationship. I just feel fucking devastated. I haven’t been in a relationship for 8 years, I have trauma with my previous one. I was only with this person for 4 months but I feel like my heart is never gonna heal. I just need some advice on how to work through this and move past it.