Seeing someone after living alone?

I recently started seeing this really wonderful, kind man, that ive previously always been attracted to and i find myself making up reasons not to see him so i can be in my own space without him there. Is it that im not attracted to him or that hes not right for me or is it just that i like my own space/life. I find myself getting annoyed when i know he is coming over. Making up reasons to not see him. Im seriously constantly thinking of ending it, but i know i might never find someone as good for me as he is. Please help.