What are ways I can convince my bf that there are better outlets than weed ?

You really can't fix that. Only he can. A lot of people with mental problems like bi-polar use either alcohol or weed constantly to dull their depression and/or mania.

I have smoked for decades and one thing I have learned is that when one person does not and one does in a relationship...it sucks for the one who doesn't.Unless the weed smoker is not a selfish jerk who chooses the weed over the partner. You can remind him how boring he is when he is stoned...that he pretty much leaves you alone when he is stoned. Whatever you say...you need to think about what you want in a person..how you want to be treated. What he is doing is selfish and childish. Please don't jump to his defense...that kind of behavior says a lot about him. You deserve better

Does he know how you feel? If not, tell him how uncomfortable it makes you. His habit merits a discussion If it threatens his relationship with you.

Then figure out what your bottom line is - what are you willing to allow within the relationship? If he can't respect that and respect you, then you need to be ready to tell him should he cross that line, the relationship is over.

What your boyfriend is doing may or may not be an addiction, but clearly it's a habit that's interfering with your happiness. Give him all the information, then be willing to make a decision and stand by it. Good luck.

You can't.
No one can control the behaviour or addictions of another.
Your only choices are to accept him as he is,
or move on and find a partner who has no addictions.

It's a habit, and only he can decide to stop it his own self. Much like an alcoholic, drug addict or smoker

You can't fix it without choosing to accept that as part of the package to be with him. You should let him know how you feel about it, if you have not already and then he has to decide what he wants.

this is a non negotiable, you will never change him

Honey you can’t fix it! I got divorced over it!

He might be addicted, so that would make it extremely difficult to get him to stop. Unless he wants to change I don't think there's much that you can do about it.

Dump him.. He's always going to be a child now.

Turn him on to hash. It doesn't stink and has a mellower buzz.