I have sent a lot of messages to lots of people and got no replys.

Well, that is always their option :-)
Enjoin the forums, lots of active people there :-)

Maybe you should think of an interesting topic., i personally dont reply to hi and hello. Except if you are my friend. Welcome

Most times no reply is a reply.

Try partaking in forum chatt, you're most litely to be noticed maybe you'll then get invites. I often don't respond to massages unless one comes accross senseful & interesting, which again can be expossed in the forum chatt when one responds to the asked question.

That's when you then decide if its even worth you reaching out for friends request to that particuler person. Try the live chatt or the forum room for a change, instead of just sending massages to people who haven't even accepted you as a friend.

All the best!!