Maybell, I wouldn't worry too much about the FB thing, he didn't necessarily friend her out of undying love, maybe she just sent him a request and he accepted out of wimpiness or maybe out of curiosity.. who knows! Don't let it ruin your PMA.
It's so easy to read into the posts, comments, likes... and of course we try to figure out the meaning behind everything and often we are wrong. I do this all the time so I banned myself from looking at his profile for a while and that helped a lot.
Try not to let it bug you too much and just use FB to your advantage with awesome pics and posts of you GALing away. Even if H doesn't notice, at least your friends and relatives will be jealous of how amazing your life is and how gorgeous you look!
I totally know what you are going through, similar FB strife on my end here too.
