My daughter had a bad break up, the weekend of her thirtieth birthday. She was super sensitive to all the happy happier happiest stuff on FB, it just hurt her.
Well, she had a year or two, and then met someone, got married, etc. But she still doesn't put much up about her happiness, she remembers how sometimes it burns. You have many more happy days ahead, I'm sure. Of course to me 33 is very young (I'm 60) but there is so much time for you to have the good things in life. I hope it for you.
Plus I really believe that the more people brag on FB about how happy they are, the closer one of them is to having an affair.