泊まってもいいですか? まだ離れたくなくて。。
"It's ok if I stay over? I don't want to be separated yet..." To which the other character thinks
(そう言えばいけると思ってるな いいけど。。。)
I don't understand how いける is being used here. I know いける is use for "going well" but I don't see how it related here