Student or Learner
“Cal, it’s fine,” I insisted, even as my cheeks burned. “I didn’t actually think you were hanging out at Hex Hall because of your burning love for me. But that’s what I’m telling all the girls back at school,” I said, stabbing a forkful of eggs. “I’m thinking ‘heartbreaker’ might be a nice addition to my ‘avenging witch’ reputation.”
she speaks for past tense or future tense?
(She just found out that Cal in love with her)
The first sounds like it should really be a future tense. It's sloppy grammar but you do hear it said like that in casual conversation. She means that is what she has decided she will tell all the girls.
The second is a present tense. "I think". It's made continuous to emphasise that she is literally thinking it at that very second, it's occuring to her as she speaks to Cal, as opposed to "In general, I think I like the colour blue".