How do I approach my bf about the fact he has so many online female friends?

How do I approach my bf about the fact he has so many online female friends?

My question is, how do I approach my bf about the fact he has so many
online female friends? He has excuses for it of course but I'm
uncomfortable with it and really hate he has a tagged profile. He claims
it's to keep in touch with friends but I don't know what to believe.
I've been cheated on before so I have issues with trust.