First, ((hugs))
Second, can I suggest looking for not-internet socialization? As someone who's struggled with depression (and I don't say that to try to compare to what you've been through; it doesn't begin) I found that talking to a real, physical person face-to-face, however briefly, helped me much more than talking on the internet.
Of course, online has its place; it's especially good for talking about things which are too personal to discuss face-to-face, if you don't have anyone to confide in. And it might be different for you since you're an introvert (although I thought I was an introvert until I got my depression under control, and then realized I was a total extrovert). Plus it's just hard to work up to talking in person when you're feeling lost and depressed.
But if you think you can manage it - even if it's just chatting with someone at the bus stop, or exchanging a few extra words with a receptionist - please do try. Internet is a poor substitute.