other guys telling me I'm beautiful and sending me pics???

I have two other guy friends besides my bf that I'm pretty close to, but the one sent me a shirtless muscle pic, and the other was telling me I'm beautiful. Thy both know I have a boyfriend, do you girls think they are overstepping? I think of them as brothers more than even friends...and I have no interest in them in any way other than as brothers. My boyfriend got really upset about the muscle pic, but he has yet to see where Josh called me beautiful. What do you girls think?