We will always be "just friends"

We never slept together but we shared a bed more than once. We never kissed but we held hands. We were never boyfriend/girlfriend but we were close friends. My flatmate once told me "I hope you two end up together". Don't really know how he felt about me but I felt something for him. Nothing ever really happened but wish it had. He has someone else now. He's one of the reasons I need to leave this place. We were out together with friends and as the two of us were getting drinks another couple assumed we were boyfriend/girlfriend when starting a conversation with us. It was like a knife went through my heart...