I am not a doctor and cannot make a diagnosis but I just wanted to jump in here and say that, while the seizures may be a symptom of alcohol withdrawal (and it's very dangerous to attempt to detox at home), they were also a symptom of end-stage alcoholism in my late boyfriend. So whether you want to pursue a relationship with an active addict is your business, but the decision may be made for you if your boyfriend is, indeed, an end-stage alcoholic and he continues to drink and avoid treatment. And for most folks, including me, that is too big a burden to carry.
And while it is a much healthier and prudent choice to pursue a relationship with an emotionally available, emotionally healthy, and physically healthy partner, I realize that you will do whatever you currently deem best for yourself, regardless what folks here recommend. So I will only say welcome to the forum and we are here to offer support, answer your questions, and share our experiences.
And one more thing, Alanon is a wise choice.