Happiness comes from within, not from outside forces. The problem is in that we surrender control of our happiness to others or circumstance....don't.
Sounds simple I know but it's true. Start by making yourself smile, you'll feel like a dolt at first but after a while you'll realize that you actually feel much better. Actually force it upon yourself for a couple hours. The purpose of this isn't fakery, but to prove to you the power you have over your emotions.
After that, intellectually look at your situation as opposed to emotionally feeling it. You are(as are the rest of us) very fortunate people and live charmed lives on a global scale. Realize that in your mind and the good emotions will follow.
You are young, educated, and (since at least two woman allowed you to touch them
) I assume not unattractive.....know this and let it bring you happiness. The world is still your oyster my friend, your mind already knows this so let it take the reigns for a while.
Best wishes and happy birthday.