I found out from a mutual friend she cheated on her previous bf about a month after she turned 18. They were dating for a month and a half. He went off the radar for 3 weeks and kept bailing on her (drug use) so she cheated on him with another man. 

I have no reason to suspect she has cheated on me, however I have an anxiety and keep hearing "once a cheater always a cheater". I can't seem to shake this and have been developing trust issues due to this. I guess I'm just looking for advice or reassurance. What would you guys do?
user
GF had a shitty previous short relationship with a commitment phobic drug addict (she was unaware)
assistant
I found out from a mutual friend she cheated on her previous bf about a month after she turned 18. They were dating for a month and a half. He went off the radar for 3 weeks and kept bailing on her (drug use) so she cheated on him with another man. 

I have no reason to suspect she has cheated on me, however I have an anxiety and keep hearing "once a cheater always a cheater". I can't seem to shake this and have been developing trust issues due to this. I guess I'm just looking for advice or reassurance. What would you guys do?
user
Found out my gf of 20 months cheated on her previous bf. Finding myself having trust
assistant