Can my partner initiate BV

My partner and I  had a spell of about a month or so without sexual intercourse. 
We had sex recently and I think I have Bacteria vaginosis... I use to get it often when he used to cheat on me all the time. 
Is this an indication that he has been else where? I have considered that my period stopped just before we had sex so it could be an imbalance.. But I'm not convinced because I have been fine for a long time!!??