What is the difference?

There are people that I find physically attractive and have zero feelings for them. If you base relationships purely on looks then that should do it for you. Typically getting to know someone leads to feelings over time, romantic or otherwise.

Attraction is a desire to be physical with them. Chemistry is how well you hit it off. Feelings are an emotional response to events. ‘Connection’ is the degree of knowing each other, and then there’s the development of friendship.

Most of it is lust, pure and simple. We try to paint it with pretty words, but it's lust.

Feelings are when you still care for them in bad times. You care about their well being. It's more of a heart - mind thing.

I think attraction is when you find someone attractive but you don't know much about them.
Chemistry is when you know the person and the chemistry between you two results in feelings.

Attraction is physical.
Chemistry and Feelings are mental.

The attraction is empty. There is no interest other physical attraction.

Just the level of concern of their well being