Sparring someone a foot taller

I’ve (f/26, 130lb 5’) been training for a year, I’m pretty ok, probably one of the better fighters at my gym. Bc of this many want to challenge me. Yesterday a girl (abt 160-170 probably, 6ft) wanted to spar. She was hitting hard not doing light sparring the way we were supposed to. I handled myself well. People were trying to break it up, said it was too much. I’m just disturbed by someone that size wanted to spar hard. Mind u, she didn’t ask me to, she sent another girl (who is also shady) to ask me for a round. How to handle having a target on my back when I’m literally a great partner, don’t hit hard, never to do too much, yet this is the 3rd time I’ve been challenged maliciously (2nd time by another girl). I was proud of myself but my spirit was low after training yesterday.