...well truth be told, not many people can embrace the wonders of ducks! But what you say is true, nobody can go through their lives without the support of at least one other person. In this world so full of human life, we are all dependent on each other. There is no such thing as a truly independent individual, or if there is I certainly have yet to meet them; and in my opinion they would most likely be one of the most loneliest sorts I could ever encounter. While we uphold qualities that we believe are unique to ourselves, it does not change the fact that we are a community, and we are no different than each other. The world has not been able to evolve through singular actions alone, it is mostly because of combined efforts that many have excelled in their own life long goals.
And through any journey to achieve that goal, you can expect many obstacles to try and stand in your way, perhaps even aim to avert your eyes from your chosen path and make you lose sight of the things that had once made sense to you. It's only natural to feel that way, we are human after all; it cannot be helped that at times we have all sorts of negativity invade our logic. But this can only be a phase if you're still determined to get somewhere. Feelings and emotion may have a strong hold over you, but it can also serve to be the most horrible delusion that you do not need. There's more you can learn from the tougher ordeals in your life than you can in any scenario you can find solace in.
Hmm, Cambridge? Sounds like you're aiming high. Good on you!