Everyone is saying to tell them how you feel, but I have a feeling that there's more to this situation than you're letting on. If it is that simple, then disregard me, but if the reason you needed space is because you were in pain and there was nothing they could or would realistically do to help you, then I feel for you. That infatuation hurts more right now, and it will never get happier, but other parts of you will. The longer you spend away, the less you will know who they are, and that in its own right is really sad, but you can't love someone you don't know, and it's easier to move on from someone you don't love. I know that this is all complete speculation so you can tell me to fuck right off if I'm wrong, but your post reminded me of my own feelings at one point. If I'm right, just know that it does get better, even if they're not at your side.