You have potential claims for defamation. The question you need to ask yourself is whether the defendant is collectible, i.e. does he have money or other assets. This type of claim would not be covered by insurance. You might be able to obtain a judgment, but not able to collect. If you a simply looking for vindication, it might be worth it to you to pursue the lawsuit knowing that you might not recover.
Disclaimer: I am not offering legal advice. I am just making suggestions for starting points for when you do speak with an attorney. Do NOT rely on anything I write and contact a lawyer.
Internet privacy rights are in a state of flux. Federal rulings and state rulings by the various state court systems provide some guidance, but each situation is very fact specific. Without a great deal more information about the particulars in your situation, a meaning answer is not possible.
A good number of commentators suggest that the internet is a public forum with little privacy options available. Inroads to adopt and enforce privacy rights are being made, however.
A public picture of you taken in a public place and posted on the internet that causes no harm to you is quite different than an intimate picture of you taken in a private place that is posted publicly on the internet and causes you harm.
Contact a local lawyer that will provide a consultation to you so you might explain your situation in more detail.
Good luck to you.
NOTE: This answer is made available by the lawyer for educational purposes only. By using or participating in this site you understand that there is no attorney client privilege between you and the attorney responding. This site should not be used as a substitute for competent legal advice from a licensed professional attorney in your state. The law changes frequently and varies from jurisdiction to jurisdiction. The information and materials provided are general in nature, and may not apply to a specific factual or legal circumstance described in the question.