I'm single and love it - you couldn't pay me to go back to being married again; I love living alone, love answering to nobody, love being able to walk away from friends' kids after playing with them, love planning my own future as I want it. Sounds like you're lonely and need to find your community, and that would be the case even if you had a partner; in fact if you were partnered you might be unhealthily spending all your time with them right now.

There are tons of posts on here about finding friends and getting out there. I favour sports leagues of one sort or another, dog parks/rescues, and toronto outdoor club (hiking/camping club). I go for drinks and things to work colleagues. I also tell lots of people that I'm single and open to dating if they know someone who might be a match for me - much better way of meeting people than shitty apps. Not my thing but i know several people who rave about ultimate frisbee as a great way to settle in. In general (and I'm an immigrant) i find Torontonians to be friendly and fun.

Resolve to fill your weekends and evenings with activities for the next say 4 months - throw yourself into a bunch of stuff - and then after that sit back and decide how it went. If you want buddies to attend an event post on here somewhere and I'm sure others (including me) might be interested. Good luck.