HEY :) i just some advice on a boyfriend issue.?

[ChalAru93]

my guy friend on facebook, just liked my profile picture. n when he did that i realised he had changed his picture and i went to have a look at it n liked.so my casually wrote on my wall saying, hey we liked each others pic. my boyfriend upon seeing this got mad for idk what reason n got so upset. i mean i think its completely fine but somehow my bf doesnt like guys posting on my wall or calling my phone. how do i talk to him bout this? what can i say? because i just got completely pissed that he had to bring up such a petty matter.