Can me and my boyfriend get pregnant if he smokes weed daily and we've use the pullout method for about 2 months?

Yes: Yes, without a doubt. If you wish to avoid pregnancy, I recommend consistent use of an effective method of contraception: condoms, birth control pills, birth control patches, depo shots, an intra-uterine-device, or a skin implant. Pulling out is better than not pulling out, but you can definitely get pregnant while doing this.

Some basic facts: Smoking weed is cited by some as decreasing sperm production, but not enough to prevent pregnancy. The excited penis is secreting sperm continuously during sex & it only takes one to get pregnant. Pull out methods are wishful thinking. Either start some other form of contraception or begin planning for a baby. It will happen soon enough.