Ok, so I didn't answer her call last night and she sent two text messages this morning:

"Good morning, how are u? Are u still mad at me? X Jul(ia)"

I did not respond. A few minutes later:

"It's a pitty we didn't sleep tgth last night so we could still be in bed knuddeling.. (German for canoodling)"

What should I do next? Despite the fact I fucked another girl last night, I still miss her and have some feelings for her. But, as one of my female friends told me last night, "You should play hard to get with her."