How to get a guy back after 3 months of time apart?

How do I get my ex back after 3 months apart? He said he wanted to focus on himself and that time would be the best thing for us. That we would be friends for now. It was mutually decided, but I decided I don't want that. I've respected this time and space for awhile now, but I can't do it anymore, it's driving me up a wall not having my person. It was 4 years, and that is a pretty significant chunk of time to just throw away everything we built.

How to get a guy back after 3 months of time apart?
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