Stupid in love

Everytime I look in my so phone Im finding something new That's leading me to believe he's cheating on me... Yesterday it was dating sites today is aDM on Instagram... When I confront him about it he says that he only wants to be with me... I just feel like because Im a great woman and mother he's trying to hold me back from moving on...I really don't think I can take it anymore we've been together for 3 years already and I really don't want to start over bit of draining me! Im stuck between a hard rock and a hard place right about now!