You can certainly sue him for trespass and invading your privacy unless he had some right you're not telling us about to enter your bedroom. What you're describing is really pretty creepy and I would suggest some extreme caution in dealing with this entire situation. It may be better in the long run to gain distance from him rather than continuing to engage in contact with him by filing suit. Better talk to a local lawyer and lay out all the facts then think carefully through your options. Good luck.
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Bits of your story are missing, others seem out of order, I think you would benefit from a face to face with an attorney, to discuss ALL the details, and determine if you have any damages to recover.
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