Conduct an experiment:
Pretend.
Pretend that you’re capable of more. Pretend that you’re destined for greatness. Pretend that everything you do will work out perfectly for you, with or without your conscious effort applied. Pretend that every single thing in the universe is coordinating together for your maximal growth and enjoyment.
Just pretend.
dating to marry will make you realize that the "plenty of fish in the sea" narrative is false. alot of people are really not worth that level of intimacy