You shouldn't feel so much pressure to smoke. You have been doing it for a while and havn't been very pleased with the results. I would suggest you tell your boyfriend to smoke if he likes, but you don't want to anymore. You are spending money on grass, literally. If it isn't getting you high, there really isn't any point in buying it. Some people do have a hard time getting high, some never can. The only possible reason I could think of is that you aren't inhaling right, but you said you are.

I'm not sure, but I think the best option is to stop spending money on it. If your boyfriend isn't alright with you not smoking, dump him. Why should you be forced to go through the motions of smoking if you aren't even getting high. I imagine that would be rather annoying.

Any way, best of luck with which ever dicission you make, but I would give it another month tops, and if still you don't get high regularly I would suggest sobriety.