First let me say that almost everyone goes through a time when life seems meaningless and not worth putting energy into (barring any psychological illness). It's part of the growth process.
To paraphrase Edison - "there is no progress without discontent". It's time to change your thinking, your beliefs and your perspective. You can do this without hurting anyone. It will take time and it may be painful but you must confront yourself. Life has as much meaning as you decide to give it. It's time for some soul searching. Read philosophy, literature and science. Go for walks along a river, in the woods or during a rainfall. Get some exercise. Experience, feel and think. Learn to enjoy the opportunities you have. It will do you good.
It's not about anyone or anything filling the void for you. It's about you discovering who you are and what you want. No one else can do it.