anxiety helpppp

Alli • Michael 💕💕
constantly fighting with my boyfriend because my anxiety makes me think he's doing something wrong when i know he's not.  and then i put myself in a bad mood arguing with myself so i tell him that i need reassurance so that he can tell me it's all in my head and everything's fine but he takes it as in i don't trust him but i do 
i just my anxiety  is so bad and i just need his help but he won't help  
it's messing up our relationship the only issue is my anxiety what should i do????