How to deal with my mom's new boyfriend?

its been 2 years since my mom have had a break up with her Ex, now she is dating with a other guy, his behavior is very rude and arrogant with me, he try to bully me sometimes as well, besides when he come to my home he acts like he owns the house and he own all of us , he often hugs my mom tightly, pat on her back and even kiss her, I have a 19 years old sister and now he also hugs her same like my mom and even few times he pat on her back same like my mom, this made me irritated and angry but my mom just ignore his activities, few days ago he asked me to take pics when he stood between my mom and sister grabbing their waist just like he is boyfriend of both,

he is 6'3 tall and very structured guy, so I fear to confront him physically but I don't know how to deal with him also with this situation?

How to deal with my moms new boyfriend?
How to deal with my mom's new boyfriend?
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