I want you to know that I'm not trying to steal your boyfriend
Why would I think that you were trying to steal my boyfriend?
I have my reasons I guess. Maybe you should settle down with him though. You seem to really cook him some nice meals as well!
I'm not sure why you would bring any of this up to me in this way, it seems almost like a veiled threat. You should keep your thoughts about other people's relationships to yourself for the most part, because it can start a lot of fights which I doubt you want to have.
I'm only letting you now that I'm not in a competition with you.
That's fair, and I don't have any problems with you. There are plenty of fish out in the sea and I would prefer to keep the drama to a minimum between us.