If i may have my 2 lindens worth on this topic...
Is it possible to talk to others on this grid. Yes.
Is it possible to interact and even make friends on this grid. Yes.
Is it possible to start a RL relationship? Possibly .. BUT...
Really be upfront about that you are after a RL relationship,
and make quite sure that others you seek are the same.
Also many avatars look nothing like the real life person (some do look like their real life person however.)
This is an international grid. The chance of meeting someone that is not in your country is quite possible.
Some people build, script, explore etc, and have no desire to do much social on the grid.
Personally, i think you would have more luck at a reputable dating site than here...
Also, there are people out there that will play with your feelings..
Please be careful and good luck, for i feel you will need it.
Hopefully that wasn't too direct, but to the point.