Relax buddy, I've got you covered. If you're trying to make this happen then sit down and listen up, we've got work to do.
The app you choose doesn't matter. Make sure you put effort into your profile, you may need to use it more than once.
Ideally, a 9 or 10 on the Crazy Scale™ is preferred, but beggars can't be choosers. We're here for a flat tire, not for things to get dire!
Please note that the Crazy Scale™ is a fictional concept. Use your best judgement to determine the craziness of an individual.
All good things come to an end eventually. Hopefully this now ceased relationship wasn't one of these "good things", since you can't proceed to the next step while going steady.
Ideally, this breakup should be messy. Consider cheating, lying, and being a real piece of work.
If you performed all previous steps correctly, you may happen to wake up to your tires slashed.
Enjoy your flat tire(s)!