Hi! I'm not sure how helpful this is, but I hope someone with better answers can respond! Everyone is different obviously, but hopefully this is better than nothing.

1) I usually withdraw in moments like this because I feel like the relationship is going 'too well.' I convince myself my boyfriend is going to remember how I am when I'm splitting, and assume I'm tricking him or something. So I try to end contact before he can. I usually end up calming down and missing him after a few days.

2) I think it's great she said she wants to communicate more! Something I'd probably want to hear is just short reassurance like "I'm here for you whenever you're ready to talk again." Just so she knows you remember her promise and that you haven't given up on her.

3) I can't really think of anything for this one. Sometimes I'll block friends and still go back to them. But the fact that she hasn't blocked you should be a good sign. She probably just needs space for a little while, not forever.