Most Helpful Girl
I think in this sort of situation you have to treat her as if you guys were on your first date.. like tell her she looks pretty that day, or whatever. maybe hold her hand.. its a delicate situation because you don't know where her mind is at, but it seems like she still has feelings for you too (3.5 years is definitely hard to get over) but I think you're right, just let her lead. I feel like you should know her well enough that you can read her body language. Like if she looks like she wants to kiss you and it feels right, then go for it. but again its delicate so you really have to read everything right. if she grabs your hand and leans on you and does all the stuff you guys would normally do, then that's a green light. make sure she knows that you missed her and that you really enjoyed spending time with her again.