Ghosting but never broke up?

I don't know how to put it together so I'll just say it...
Its been roughly about 6-7 months and I can't stop thinking about my ex, no I'm not obsessed with her but I do miss talking to her, when we were together we argued and she left never to come back due to me ghosting her for a bit, I know that after a while she'd sent me some messages but I'd push away now she ain't even using her FB n I get nervous to even send a message to her... how do I go about this? It's not me loving her or wanting to get back with her, I just feel like complete shit n I'm tired of it
Ghosting but never broke up?
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