Congrats on beating your depression and committing yourself so faithfully to God! Sorry this is so hard.

As someone who has tangled with porn, I can tell you that webcomics aren't a good alternative. It's not just a question of hurting someone (which porn does--it's fueled by meth), but it's also a matter of not warping your sexuality.

If you don't think masturbation is a sin (I don't either), go for it. That could be a really great way to ease your tension.

I personally think there's porn that isn't sinful. Obviously, not all sex is sinful, and imagining and enjoying that (in moderation) doesn't seem to me to be spiritually impure. I quite like fanfiction for those purposes. Here's Doctor Who and some companion enjoying their honeymoon. I am not condoning everything on this site (and I haven't read that particular fic), but there are lots of well-written depictions of loving sex between married (or soon to be married) couples. Just think of a fictional couple you like, and there's probably something wholesome to read.

Also, definitely get on OkCupid. That's the best way to get some dating experience. Try that and browse this blog, and you'll have a nice girlfriend in no time.