Thanks but I wouldn’t leave them with strangers, maybe I’m just destined to be single forever
I think if you don't want to be single forever, you'll need to put some effort in to get over the "not leaving them with strangers" part.
Like yeah, a random teenager off the street is a bit much from the get go - especially with four of them and the oldest being only ten and the youngest four.
But if I was you, I'd start planning now so that come the autumn, you've built up a bit of trust with someone?
Why not start off paying a teen to baby sit for an hour while you're home / in the garden / out for a jog around the block? Then the older two for a few hours while you're out? Just work up gradually until you trust them? Since any potential dates will probably be a night, and you can put the young ones to bed, you're really just looking for someone to be responsible in an emergency, stop them from killing each other or themselves, and contact you if they're not sure about anything.
If that's totally out of the question then the only other thing you can do is hope to meet someone at work. I did this once... was fine having him over when the kids were in bed because I'd already known him for a year so was as confident as anyone could be that he wasn't a mass murderer.
If that's a no too then unfortunately I think you're probably going to be single for a while, at least until the oldest is a teen and can babysit for you. Good luck whatever you decide 