u/Safe_Tomatillo502

So recently i broke up w my gf, almost a year together. we were constantly arguing and it was nvr going anywhere, i dont regret the breakup, BUT 3 days after the breakup shes seen with another guy already, thing is when i was with her, she had nvr had any guy friends that i knew of. and since im in the same school as them, i see them tgt alot, and it hurts me so bad, i wanna know if u guys think whether she was cheating when i was w her or nah, bcs it seems so, and idk how to feel abt it. pls help me guys