Does he really love her?

Hello guys! I just want to ask something. If someone asked you if you're inlove with your girlfriend, would you tell it by having some unnecessary gestures or just say it like you mean it?

The reason why I asked this is because I was inlove with a guy. We were in a friends-with-benefits relationship until I found out that he and the girl I hate (ex of my friend) is now together.
He kept that fact from me for a few months.

Before I knew it, my friends, including him,were drinking in a bar then suddenly the topic was about love.
He said, "good for you guys you have that kind of love" That time I know that he wasn't lying because he told me a year ago that he have never experience what it's like to be madly in love.

That event happened two weeks before I found out about him and the girl.

And when I confront him about them, I asked him if he loves her. He answered "yup".
Weeks after that, my friend told me that when she was driving, she saw him walking in the streets and she guessed that he went to that girl's house. So she offered him a ride. He accepted.
My friend asked him, "Does she(me) know about it?" (She was acting like she doesn't know)
He answered, "yes"
She asked "Do you love that girl(she was referring to his girlfriend)?"
He answered, "mmmm...yes" She told me that when he said it, his gestures were like he was so unsure of what he will have to say or like he was forced to answer it just to finish the conversation.

So do you think he loves her?

I feel he uses that word loosely. I suspect he just says what you girls want to hear so he can have sex.

I mean really, what do you care? He doesn't have any feelings for you, that's all that should matter. Don't worry about it.