Always remember the proverb: "This too shall pass." Your negative feelings won't last forever, there's a light at the end of every tunnel. It might not happen today or tomorrow, but you'll feel better eventually.
This miracle is in the small things of daily life; we must live in the understanding that at every moment there is a way out of each problem, the way of finding that which is missing, the right clue to the decision which must be taken in order to change our entire future.
Choose the mountain you want to climb: don't pay attention to what other people say, such as "that one's more beautiful" or "this one's easier". You'll be spending lots of energy and enthusiasm to reach your objective, so you're the only one responsible and you should be sure of what you're doing.