From my experience there is no quick solution for moving on from someone you love, therapy or medication didn't help me so i had to learn to get over it myself and the way i did that was i buried all my emotions and memory's attached to that person and went on and experienced life without them. Also the universe is here for you and you are not here for the universe or the world but you don't own the universe and that mean you don't own anything in it, you own nothing apart from your body. when you pass on you don't take those possessions with you, they stay here and become something else or end up in the hands of another person. the same principle goes for people so i thought... well i never lost my girlfriend.... I disconnected from another consciousness that i became intertwined with and she was never mine or a girlfriend because you cant own anything in the universe including people and children so there for i lost nothing and i noticed i was upset over something that never even happened. just like how my house isn't my house its A HOUSE i reside in to meet my desire for comfort and my money isn't my money is a form of currency i acquired to use as a tool to achieve my goals. If you remove the MY and MINE and OWNERSHIP and BELONGING from most things you start to get rid of the ego that is responsible for some of our imagined problems and the cause of other peoples imagined problems. The alone feeling your experiencing is normal but being alone can be positive as you get to know yourself, some people cant stand being alone which means they cant stand themselves. being alone gets you to know yourself better, also rejection can be hard and your mind would be going into overdrive with thoughts but that's the problem and thought's are what cause all of our imagined problems, we must learn to observe their presence and their absence because your thoughts are not who you are they are things that randomly happen like everything in this world are just things happening and if you go deeper nothing is real as you know it, its just your perception or what you perceive and there's always more than what meets the eye, our emotions are influenced by thought and what we perceive to be real. And your body is not who you are either, your body is a vehicle that you use to interact with the universe, you are much more inside so don't perceive yourself by looks. As for sleep, try meditative techniques there's a good app called headspace. As for food i have no idea.
