Because you already spend so much time on there, you might as well make actual friends.
(We haven't launched yet)
I made so many friends I haven't seen my girlfriend in weeks
Making friends was hard because I never leave my room, but now I don't have to... Take that, mom!
If this doesn't get me a girlfriend, I don't know what will
Sending DMs is scary. Sending cold DMs is even scarier.
You already follow them, why not actually talk to them?