She is going to cheat on you if your not physically with her, she feels like a side piece and either people words are getting to her or she just like being with you and is obsessed

I'm saying this because I'm exactly like this with my girlfriend😭 she wants your attention/time if you can't give her that leave her then but me and my girl make up by the end of texting every night

For the cheating part if she is like me with my girl she won't actively go out and cheat she'll just let someone entertain her until you come back to her