Could it be AF just took a pic of what her contribution to Valentine's day was? AF "tagged" her BF to the post, so wouldn't it be a "heads up" kinda thing, like "Hey guy, This is what I'm bringing so better bring your "A" game?" and a public post of "I'm am sooo in love with my BF"?
And aren't we making a lot out of this last "Public" FB post? You have options to post to "Public", "Friends", "Family", "Only Me" or groups that you specify. There were probably LOTS of posts that she had that aren't accessible to everyone. If you just look at the pics you can see, they're all pretty "vanilla", AF with girlfriends usually with a drink in her hand, AF with her BF, AF at a sports event, AF with colleges from work. It's not real personal.
Where's the "I just closed on my first house, I am sooo excited!", "Going to Jamaica this weekend, bought a new dress!", "Big plans in Israel, getting engaged!", "Finally caved to the BF and got a security system", or "Need some repairs done on the house, anyone have the 411 on a good handyman?" <------That's the kind of stuff you'd post to family and friends because not everyone can drop what they're doing to reply to text or answer the phone.
JMO