Hi guys, I need your help again.

During the summer break I met this girl. I got her number, we texted/talked to each other, but then she went on a four week vacation. That same week I also went on a four week vacation. During the vacation we didn't have any contact. After we both returned things sort of cooled down. We both didn't really text as much as before, didn't talk as much as before etc.

Now I want to re-ignite the spark. What's the best way to to this? I have considered the following things (as we have each others numbers we don't need to #close anymore, so that part is skipped):

1. I'll start by casual texting, only hoping this will ignite the spark again, after which I can take it to the next level (tease her, negging etc) and after that ask her out on a date.
2. I could just go to her and ask her straight away if she wants to go out with me.
3. Just pretend I never met her and start doing some PUA shit on her (although this would seem suspicious because we do see each other about twice a week and I haven't been that flirty in the past)

So with which of these appoaches do I have the best chance of re-igniting the spark? Feel free to suggest other things.

Oh, and if you say I should start with some casual texting, please give me some great starter topics, as we haven't had much to talk about the last few weeks, so there's no callback humour.

I find this text works wonders in these kind of situations. 'OMG have you been kidnapped? tell them i will pay the ransom! p.s are they feeding you properly?'. When she replies act as if nothing has changed with you guys. Tease/neg her, bring in some old personal jokes. From my experience this is a very good way to start chatting again and a basis to rebuild attraction.