I'm in a relationship but....

Ok well I'm riding with my future mother in laws friends husband to work.. Only for 3 weeks well everyday he tells me I'm sexy... Can I bite your neck or... I'm glad I got a sex girl riding with me.. Ask me if I will have 3 some blah blah... I told him he made me uncomfortable but he still does it. What do y'all think should I tell my boyfriend he trust me 100% but if he knew omg he would be highly pissed might say or do somethen.. Just don't want to cause drama