How to get over someone you didn’t love?

I was dating a girl for a few months and believe me when I say she really was great. The kindest soul I have ever met. However we didn’t click, i don’t think I loved her as I don’t think I was over my ex. We gave it a go but it didn’t work out and I could tell at the time I didn’t love her properly I didn’t have that you know when you know feeling.
When we was together was a weird time for me I lost a close relative and as mentioned don’t think I was over my ex.
I didn’t put in the effort I know I can with her and i do regret it and take full responsibility for that.

Even though we stopped seeing eachother two months ago, it’s only jus really hit me now, is this normal? I can’t stop thinking about her even though I knew it wouldn’t work out. I feel heartbroken even though I knew I didn’t love her. I’m back in the same boat of thinking I will never find someone whose as good as her again and feel like I won’t find love again, anyone been in a similar situation?
How to get over someone you didn’t love?
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