Situation:

First option above, new girl has come into the picture. Very interesting, good sense of humour (compatible with mine, which is rather rare) quite pretty. 70% sure she's interested.

Second option...ex girlfriend.
https://forums.totalwar.org/vb/showthread.php?t=106367
Her. Backroom thread, so you may not have access.

You may ask, why?

I still love her. I can't stop. I talked to her sunday night and did everything I could to start despising her properly, but it ended up we just talked about the first time we spent together and how happy we were.

Bad idea for first one: Shes three years younger. Which makes her 15.

I'm caught in the middle. Right now, I aim for the former and back-up meeting with the latter.

Is either a good idea?