What do friends do?

So I used to be an extremely abusive relationship age 15 to 16.

I became incredibly socially isolated because of my then boyfriend.

Im 20 now. Years have passed. I used to just go trough the motions of life after this happened, eventually I got a really sweet boyfriend. We moved town and now I'm here.

My lifelong friend (met her at age 4-5 ish) and I grew appart b4 my previous relationship but the relationship definitely ruined all contact we had. Recently she asked me to hang out again since she is coming to town.

I don't want to talk about what drove us appart. We already had some contact since, maybe every 3 months. (We used to see eachother daily and do sleepovers every weekend. I stayed at her house and she at mine for up to a month at some point, we might as well have been sisters since my parents treat her like a daughter and hers did the same for me)

But since I honestly have no friends and havent had any since 5 years ago I'm not actually sure what friends do.

What do you talk to your girl friends about? Do you reguarly just sit down at a terras and chat? Am I supposed to plan some kind of activity? We're both 20 btw.

She's been very sweet and says shes open to anything, im just not sure what's normal.