Love, hate, depression, sadness

I'm not sure

Do you know that damned feeling when you love someone and you feel them slipping through you fingers?

I feel the love we have/ that I missed the most of all, but he is getting further and further and it annoys me.

I want to feel secure in a relationship, not scared of losing someone I love more than I love myself.

How can he be destroying me and loving me at the same time? 

I know I love him from the bottom of my heart but I'm not so sure about him...