[Peter]

Hello everyone,
I am a young INTJ, single(living on my own) and 19 years of age who has a hard time with the concept of keeping oneself happy. I know I don't need someone else to keep me happy. I have a hard time with this concept honestly, as obviously being young I don't have an incredible amount of cash at my disposal or anyone I'm close to living with or nearby. I listen to music, go for drives in my car, try attempts at humor on forums (4chan if anyone cares), blah.
It gets old fast I'll say that much, I've got some emotional wounds from growing up that may play some factoring.
Do I make any sense?
In short, advice time needed.

You need to get out more. I don't mean socializing but just go to places of your interest.

You have a car and go for drives you mentioned. Why not find some place you find interesing first and make that a goal. Could be anything and it doesn't have to expensive. Visit a museum if that's of interest or go to some lecture or what ever you like. You will probably meet people there and have some conversations. That will be easy since it's about something of your interest.

The socializing part isn't actually important, what's important that you get food for thought. Just driving is only fun in the first couple of weeks after you got your first car. After that, it's just a means to an end.