Just wanted to know if any of you have had the cheating girlfriend who claims she loves you until you either caught her, or found out she was cheating?

Did you have any clues, behavior patterns? I am suspecting but not accusing at this point, we have had turmoil since like the 4th month out of this almost 2 yr relationship. I don't believe myself to have trust issues, but I have been cheated on before and all the signs are kinda pointing to yes, even though I don't have concreate proof.