To be able to smile and be confident about it

Need a sm, BC, Canad

I've never been able to smile. Why? Because I don't like my smile. My teeth are not in perfect condition (meaning they are not aligned, they are crowded and crooked), and I've been asking for orthodontic work since the age of 13. I am now 25 years old, and I still feel like I can't smile. I wish nothing more than to be able to talk to people confidently, and smile without covering my mouth. I wish I could afford it, and I would be willing to take loans, but unfortunately, I am maxed out and I don't know if the bank will give me loans for this. This is my last hope. I have a boyfriend, and we are thinking of getting married in the next few years, but I feel like I can't even do that. I want to smile in my pictures. I want to smile in life. Please help :)