My friend is mad at me what should i do?

Well, you definitely shouldn't be texting him as much as you do. I know if my best friend talked/texted my boyfriend more than I did I'd be extremely mad. Either stop texting him so much or tell him not to talk to you that much anymore. If he actually likes your friend (which he should if they're dating) then he'll understand that it makes her mad and won't talk to you. Also, I understand that you probably didn't mean to tell on your friend and make her get mad at you, but you should also understand where's she's coming from, cause all she see's about you is how you talk to her boyfriend all the time (more than her) and that you tell him things that get her in trouble. Regardless of what she does or who she hangs out with, you and her are a lot closer than you and her boyfriend are, so you should always be looking out for her best interest, not his. That being said, just tell her that you really didn't mean to tell him that and that you didn't know it would be a big deal and that you won't talk to him very much anymore (or at all). Good luck, hope you guys work it out! :)