Loneliness is a feeling and everyone goes through, and like any other feeling (love, hate etc.) creeps up when you are having one of those bad days. Just make sure you have someone to confide in, you do need someone to give you a nudge in times of grey.

But hey, you will get over it. This is how we all become self independent…

PS: A small advice, try doing things that you love. Break the normal 'monotonous' routine, i.e. work-out, watch a movie, eat out, read a book...