How to reject someone love you, and you do not love him/her? Reject the love sure will hurt the one that love you but you do not love.That is cruel thing we need to do and clear it up.
We need to think a way to reach psychological balance on other side. Then, we try to praise him/her. After that, take the courage and state the reason why cannot accept his/her love. The content should more focus on benefit he/she will get most from him/her if not love each other.
Besides, direct talk can be used and is better. Remember not to ask third party to transfer the reject information. In addition, we need to always respect the other side. In case she/he still do not know you reject him/her, always act the reject attitude, let other side knows that you are not love him/her.
Lastly, we have to respect the other side. Please do not laugh him/her and not expose his/her love information (love letter) to others, or the molest issues.
Be responsible always. Well, both still can be friend. Still, remember not to become enemy, just reduce the interact with each other.