If you are indeed a teen, then there is a significant likelyhood that you are stupid. I say this because I was very stupid when I was a teen and am only slightly less so now that I am old(er).
Happiness is the purpose of existence and you are right to seek it. However the objective is transient and it changes with time. What you think is happiness now, will not be happiness for you in ten years, or perhaps even ten days.
The good news is however that some aspects of happiness remain constant, and if you achieve these you will have some solid lasting hapinesses to see you through the rough times. There will be rough times and many of most or them will be the result of your own stupidity.. at least thats how its been in my life so far, and I have 2/3 of my allotted time finished.
Essentially the most important ingredient to happiness is freedom. The next most important thing is to know what to do with your freedom once you have achieved it.
You have said that you want to travel. This is stupid, because it simply means that you wish to escape. You should begin your quest for self understanding by reading Walden Pond by Thoreau. Therein you will find a definition of freedom. You do not have to travel to experience life. You are life and it is all around you.
Teenagers are generally plagued with an obsession to belong somewhere and to something. plagued by instincts and urges, like the urge to have sex and to belong to a peer group. If you are looking to travel the world it may be because you feel you do not fit in, to your current social circumstance. If you are smart (smart people know how stupid they are) then you probably don't fit in, because smart people not only know how stupid they are but they also recognise that most of the people they are surrounded by are also stupid.
Effectively we are all stupid, some more than others. The key thing is to try to address your stupidity. This can be acheived by some formal education, but mostly you have to read good books and listen to good music. This is generally the type of book and music that the majority of people don't listen to or read. (Like Thoreau for example).
If you are chilled out, and you like yourself the way you are, and you have a desire to unstupify yourself, you will be attractive to the opposite sex, because these are crucial ingredients to being independent and being independent in your thoughts and your deeds is a crucial ingredient into being cool... being cool makes other people want to hang out with you and occasionally.. have sex with you.
If you are a teenager you probably want to have sex.. don't try to hard to have sex, learn how to be cool and the sex will follow.
Read Ayn Rand's The Fountainhead, if you want to learn how to be independent, and therefore ..cool.
You need money to be independent and to be cool. Therefore you need a job and unless you have an education you are likely to have to spend most of your time working.
Ask yourself what you really like to do and whatever it is, turn it into a college degree... you can do a degree in anything. If you like philosophy then do a degree in it and understand it properly.
The world owes you nothing, and you have to earn your freedom from it. If you live in a white western country then an education is obtained with relative ease. An education will help you out of your stupidity and it will purchase you your freedom, if you are careful and you choose to educate yourself in something you like then you will enjoy it.. but you have to be very honest with yourself first.
Be honest with yourself.
Work will set you free, then its up to you to cultivate the wisdom to know what to do with that freedom.
Stay away from drugs, work hard, laugh love, be independent in your thinking see 'God' in nature and in yourself, read read read, masturbate often... but not too often.
Most importantly be happy and try not to be too stupid.
M