I Am In Love With An Office Colleague But Don't Know How To Propose Him

I am in Love with one of my colleague whom I met in my office car. We know each other but not so close.

I have had a little misunderstanding with him on a chat. Not sure of how to propose him.

I love him so badly. I know he is too good and very sweet. Having hesitations in approaching him for my love as he may think bad about me.

Please give me any idea to win his heart.

Dora.