Don't know and neither does anyone else unless they live with them. It would just be a guess but I will assume they love one another because there was no reason for Hillary to stay with Bill after the Presidency and Chelsea got married.
I'm sure that they are friends, and i'm pretty sure that they love each other. love changes ... matures, over time, and i'm sure that the Clintons are right in there with the rest of us.
[edited to change "they re friends" to "they are friends".]
[edited to change "they re friends" to "they are friends".]
They are in Love !
Leave me the hell alone!