My heart is breaking someone help :(

My boyfriend hasn't been making much effort lately and well it's making me feel shit... like I'm not a priority in his life and that it doesn't matter if he doesn't see me for days straight or makes an effort to message or call.

He is also addicted to weed, this I feel is placed above our relationship, He always has to smoke at night whether that means ditching me early or I have to put up with him high. I love him but idk if I can keep going feeling like this, feeling unimportant and unappreciated. I need help on how to discuss this with him, as I always find myself unable to get my point across when it comes to it.

I can't stop crying :( I don't want to end it but what if I have to?

What can I do