I think these are normal things to be worried about that most people think about at some point in life. Though, I would worry more about worrying than any of the things you've listed if I were you. Think about how much damage you will be doing to yourself if you persist at worrying. From my point of view, it's better to have friends that may betray you and have a chance to fail you then not have any friends and fail by default. It's better to have a partner and let cards fall where they may through their own evolution at the risk they will leave you, than push them and force them and have them leave you by default. If you are open to failure you often reduce your chances at failing then if you are closed.
Don't cry, don't regret and don't blame
Weak find the whip, willing find freedom
Towards the sun, carry your name
In warm hands you are given
Ask the wind for the way
Uncertainty's gone, your path will unravel
Accept all as it is and do not blame
God or the Devil
~Born to Live - Mavrik~