Well plants don't have faces and they don't make noise so you really couldn't know if it was happy or not. Maybe the plants love you. We can never know. Maybe some people know. Sounds like something I'd know when I'm manic..."that plant just loves me because we are all one....."

But knowing something loves you is not the same as feeling loved.... And now I'm deep...

(I'm being super goofy. I hope it comes across in print and you are not offended or weirded out)