My Ex husband was an alcoholic and (eventually) was addicted to Rx drugs (sleeping pills and anti anxiety pills). In a sober moment he admitted he never loved me and never could. He married me so he could appear normal. In retrospect, he was telling me the truth.
My XABF is an illegal drug user. I was with him for 6 years and I did love him but he never loved me and is not capable of loving anything other than his next high.
It is my opinion and my experience that no one in active addiction is capable of love. Period.
Directly answering your question, No, I do not believe an active addict can love you and, taking it further, it is a waste of your time to love him while he is not in recovery.
I am sorry that sounds so hard. I am glad you are here asking questions and seeking your own path.