Not sure if I (29F) should see my husband (32M) for Mother's Day

We're currently in a light separation because of his drug use. I have our two year old son with me and I'm currently pregnant with our second. I have to separate from him because I can't allow our son around his drug use, but I am just as in love with my husband as I have ever been and I miss him tremendously. He wants to see me on Mother's Day and while I desperately want to I know that if I do I'm going to end up moving back in with him. I'm miserable being separated but I don't know that I can invite the temptation.