I feel so guilty and like a bad person, what should I do?

I am 16 and my boyfriend is 17, we’ve been together for 6 months now and have known each other 3 years prior to dating but lately I feel like I’ve been losing feelings for him. I’m not exactly sure why or when it started, I can be myself around him and spending time with him (like watching videos or playing video games since it’s long distance now) but recently every thing that he does annoys me whether it be when he talks to me or tells me he loves me. Some things he does tho is definitely a reason not to like him, for example, the immense use of cuss words towards me or in general. I just don’t know what to think or do, I know relationships have rocky paths but I feel like we have definitely hit rock bottom and I just don’t feel the same about him now than I did before and now I feel guilty on how I would make him feel if I break it off.

Please help 🙏