“I feel great that I’m hearing from you again”…is that a joke? You DON’T feel great that they treat you like that. Don’t be a doormat, it’s NOT OK to leave someone hanging, & saying that just allows them to get away with that kind of behaviour and think shelving you like a toy til they feel like playing with you again is OK. You’re better off acting disinterested & telling them flat out sorry but I’m not into that kinda thing, so you’ll have to put more effort in if you want me to stick around or I’m just going to assume you’re not interested and move on with my life. Do not allow people to treat you that way and reward bad behaviour by getting excited & happy they suddenly decide to return. Be true to yourself.
It also shows him that it’s safe to approach you. What do I mean by that? He may have been wanting to reach out to you, but didn’t because he wasn’t sure if you were still hurt or angry or bitter. With a happy, lighthearted text, you’re showing him that you’ve moved past those ugly emotions and are in a better place, a place more conducive to starting fresh.
Similarly, Ive seen my brother go through something similar. He did the exact thing with his current girlfriend, he moved out for a week to retreat after a minor conflict, and she was so upset, leaving presents at the door and calling me to find out if he was ok etc. I had to tell her to stop and give him space. He came around, I didnt pressure him and didnt go into it much. But the up side is that he’s still with her now.
The rule here is that process always trumps content. When emotions heat up, the problem in the room is the emotions, not whatever you are arguing about. Unfortunately, when emotions kick in, we’re tempted to ramp up the content as a way of dealing with emotions – you want to get the other person to understand, damn it, and you’re likely tempted to fight to the death to make your point. Anything you say is like throwing gasoline on a fire – it's likely to be misheard, misinterpreted.