Does your boyfriend receive mail at your place? If so, he may, unfortunately, be considered a tenant. Then you may legally have to provide him 30 days notice. My late husband and I had to do that with his son (alcoholic, crack and heroin addict).
If he just stays over occasionally but still has his own place, then I don't believe all that will be necessary.
Either way, I hope you can work to keep your own place peaceful and drama-free!!