Idk how to feel about it :( help

Katty
I was talking to this guy and he told me that guys who have sex with more then one  girl. He's not wanting to stay with just one he's wants more..more girls more sex and not just that one not just me  cuz (my bf had sex before he knew me) 
and I had sex with him he was my 1st .. 
So idk I feel really sad and scared cuz if its true.. 
I love him so much but idk :( 
That's like the short side of it