You mentioned feeling guilty before, so I’m guessing you’re still struggling with self-acceptance? I think working on that is the most important thing. Self-control is easier when you’re comfortable with who you are and what you do. Trying to suppress or avoid thoughts and feelings just makes them more insistent.
But in the short term, maybe it’d be helpful to think of it like this. You wouldn’t do anything inappropriate when there are adults watching, right? Ten, twenty years on, those kids will remember. Even if there aren’t adults around in the present, they’re always watching from the future.
I went to mapsupport.de because it seems likely to be around for a while, but that’s mainly because its rules are fairly restrictive. It’s not like nnia, but it still may not be to your liking. There’s also Little Lounge; it doesn’t even have a domain name to lose, so it should be pretty secure. I don’t know if all the federation issues have been worked out, though.