Is it cheating or not?

Been together for 9 years we have three kids together we had problems so separated for two months. But just in two weeks he slept with another women and it wasn't just once but twice. He didn't tell me even when I first asked before we got back together even tho I asked several times. He keep saying no there wasn't anyone, that he just took her a date and that all it was. Then after three months being back together he told me he slept with her and that he didn't want to have sex with her it just happen and he didn't like it but he had sex with twice so my just mind-boggling about it dont know what to think. He tell me loves me but Im just like if you love me you wouldn't have slept with other women and not just once but twice. I need help.