IMO... you are both doing what is best. Taking care of yourselves. If you end up together and you have both made the committment first to yourself.... great. If not... then as difficult as it might be, trust that it wasn't meant for the two of you to be together. Living with an addict is not an easy life. Most of us on here can tell you that deciding to "stand by him no matter what"... while well intended and loving... won't make him sober and can make you crazy. Please know that I say that with kindness and care. Please "stand by YOU no matter what".
Glad you decided to join us here... many will be along to offer support. Welcome.