This is a difficult question even for Spanish speakers. It depends on what you really feel. "Amor" is very deep and intense, it's also kind of romantic. "Querer" is less intense but it's still a way to express love. You can use "Amar" with your romantic partner or in situations when you need to show that you really love someone, in hard times, to apologize, etc. We use querer in daily life among relatives and friends, in "normal situations".
For example:, you can say "Te amo" to your husband. But if you say that to your children it would sound exaggerated. You'd better say "Los quiero mucho" to your children. You can also tell them "Los amo" but just in specific cases, when you really need to show them that you do love them, like in the situations I mentioned above.
Amar is kind of more deep and romantic. Querer is less deep but it's still an expression of affection
Nonetheless, I recommend you to listen to the song below, it's called "El Amar y El Querer" interpreted by the famous Mexican singer Jose Jose. I also leave you the translation to English.https://m.youtube.com/watch?v=a3xjfTEXFWg
Almost all of us know how to querer, but few of us know how to amar. It's that to amar and to querer aren't the same. Amar is to suffer, to querer is to enjoy and never to suffer. He who ama cannot think. He gives it all, he gives everything. He who quiere just pretends to forget and never cry and never cry. Querer can end soon end Amor doesn't know the end. It's that we all know how to querer, but few of us know how to amar. Amar is heaven and light, amar is total fullness. It's the sea that has no end, It's glory and peace, It’s glory and peace. Querer is flesh and flower, it’s looking for the dark corner. It’s biting, scratching and kissing. It’s fleeting desire, it’s fleeting desire. Amar doesn’t know the end. It’s that we all know how to querer, but few of us know how to amar The one who ama can’t think. He gives it all, he gives everything. The one who quiere wants to forget, and never cry, and never cry. Querer might end soon, amar doesn't know the end. It's that we all know how to querer, but few of us know how to amar.