Hi sher,
First of all, that tends to be problematic for some reason, sometimes you need to do that more than once, but just click on the name or the photo of the person you wish to friend, that will take you to their page, a box will appear for you to leave a message, which I recommend using, Then send it, if you are still having trouble, leave them a message on their board telling them you would like to be friends, but are having trouble with your controls, and ask them to friend you! It could be that they haven't been on the boards in a while too!
I'm sure that everyone would very much like to be friends with you! I'm very pleased that you and I already are!