Do I have the reason to cry?

So my fiancé's mother doesn't like me, so today I called him he was in the car with her.
He always answers me with hello baby girl, or hi my beautiful princess. Today I called he was like yes hello? I was like hey babe, he was like yes what? I'm in the car going to drop my mother to the hospital.
And I was like oh okay I love you bye, he didn't say I love you more back, he always says I love you so much before hanging up. But today he didn't because his mother is around. 
And now I'm so sad and I'm planning to ignore him, do you think I have the right to be sad and hurt about it? Please don't be mean 😞
And yes it was his mother lol in case you ladies might think he's with a girl, his mother has cancer so he's taking her to the hospital.