breakup

I really thought I loved him but I really don't feel love for him anymore. But he is completely in love with me and I'm scared if I ask to breakup he is going to become depressed again. I really thought he was what I wanted but I really just want to be single and I still care for him I just don't want to be with him. He didn't even do anything wrong. I feel like I'm an awful person but I can't keep pretending to love him! Please help me ! How should I break up with him? ! I'm a making a wrong decision ?