> 4. Keep track of everyone you speak to. Everyone. Write down what they mentioned they liked, who their family is, what matters to them. Maintain their contact. Reach out during holidays and birthdays in a heartfelt way.

This reads as borderline creepy and sociopathic. If I discovered a friend of mine did this to me I'd find it really needy and a bit unnerving.

OP - you really just need to actually chill. Throw a party like others said is a good start - but don't be a weirdo about it and overthink all this shit.

I made lifelong friends at this age by going out to shows/parties - occasionally taking recreational drugs and baring souls to one another. 20 years later we don't do any of that stuff, but we're still close and just as no bullshit as back then.