It sounds like you reconnected without being exactly clear about why you did- And if you didn't know why you did, you didn't communicate why you did, so it would only stand to reason why they only apologized and held themselves accountable for what "they thought" they did wrong- In other words, they guessed- And are maybe giving you your space to digest what got said and don't want to push and run the risk of losing you again-
I've got one that doesn't talk much so don't push and only discuss what's obvious with them until they spill their guts or beans- After they do, the air clears and there's greater understanding- It isn't lack of interest on my part or theirs- Its simply how they are and how I am-
In some situations, taking an interest can be interpreted as "pushy"- Depending on the personalities of those involved-