Don't take it personal OP, that sounds about right, that is the human race for you. Most people have a hidden agenda and will use you for one thing or another. Personally, I've been lonely for a long time, I choose to be, it's not such a bad thing, fill your time with things you enjoy doing (I swim, drive a good car, watch live football/hockey), you don't need to have friends to do stuff. Sitting at your laptop and expecting friends to appear out of nowhere is probably why you feel lonely.
If you ever want to chat, throw me a message, I've spoken to a few people on here about random stuff.