My girlfriend F22 disappointed me M24 by breaking my trust multiple times. What can be done?

Recently my girlfriend was planning for a solo trip and she asked me can she go. I said yes to it but later on when she came back from the trip i got to know that she went with some guy who i hate to my core. Then couple days back she went unconscious in gym so she wanted to have juice, i called her and she said she is going alone but again i got to know she lied and went to have juice with a guy from her gym.

P.S: i spoke to her today in the night again but she included her mom in the convo and she was also trying to convince me to sort things out. This is getting very confusing.