You may feel very lost, but you're closer to your answer than you think! You said it yourself; you are dependent on him for your happiness. If you rely upon anyone or anything but yourself to be happy, you are only setting yourself up for frequent dissatisfaction. You already have the strength necessary to overcome the bad feelings you're experiencing, and you don't need him or anyone else to do it. Your brain is much smarter than your heart is. If you have a bad feeling and you pay attention to it, it will grow and grow and you're creating a self-perpetuating cycle. You must recognize the difference between your thoughts and your emotions. As long as you are kind to yourself and take a moment to pause and revisit your logical perspective when these feelings come about, you will slowly but surely get better and better at putting your worries aside and happiness will naturally take over the bad stuff! It ain't easy at first, you will feel like you're just lying to yourself. But with persistence, things will become much clearer in every aspect of your life. Of course, I'm not saying LDR's aren't riddled with loneliness, but as long as you are able to combat these feelings YOURSELF, you will be much more independent and comfortable with your relationship. I really hope this helped, even a little! Good luck!! :)