Looking at old pictures of old times is soooooo overrated. I've never done it and not ended up crying and miserable for days. Never.
I'm an athiest now (I think) but there's one proverb that makes sense, 'do not say, why is it that the days before now proved to be better than today' or something like that. We look at the past through rose-colored glasses more than we'd ever admit.
Right now you have opportunities that are limitless, friends you haven't even met yet, people that will yet become your family.
You may be physically alone at this minute, but you are not alone. You have so much to offer, so much to do.
(((((((((((You))))))))))) are loved.