Hi Dusi2591,
I think it's very natural to want companionship, and I can understand that you miss that. These kinds of breakups are really tough, and it usually takes a while before our bodies and minds are rebalanced again. There is no exact timeline, as we are all individuals, but 4 months out of the relationship is not very long, I'd say. You seem to be doing very well.
Thinking about your ex and missing her at this stage is very normal. I understand you not wanting to start a new relationship when you haven't really ended this one in your head/heart. I don't think it would be the best course of action, either, although things happen sometimes.
I know it's not the same as having a close companion, but have you reached out to some friends to spend time with recently? Or is there a new hobby you have always wanted to try that would bring you into a new group of people? You could make some new friends and maybe a special one that would develop into something more.
What do you think?
heartandwhole