Hi all, I am a romanian national, I've been self employed in the UK for 10 years. I have a yellow card and I would like to become an employee (PAYE). I should have applied for ILR years ago but I couldn't be bothered

and now I'm not sure which would be the best route to take. Should I apply for permanent residence or am I eligible to apply for naturalisation? After hours spent reading the UK Border agency website I am still confused!?! Please help me!
Thanks in advance.