Boyfriend and Period sex

So should I be offended that my boyfriend doesn't want to have sex with me when I'm on my period? I usually try no to...but some days I think it's over and then I think I'm on the clear to have sex and it ends up bleeding a bit! And my boyfriend was mortified and thought I lied to's like chill...I bleed once a month this is nothing new. I have needs too!!! 😫😫😫