If ur bf doesnt want you to talk to your ex, and for good reason, and you still do, should u tell him?

my ex boyfriend still likes me... alot, and the last time i talked to him he tried hitting on me, hard. when i tried to avoid him kissing me he pinned me against a wall, and gave me a hickey, knowing i would get in trouble with my boyfriend that i was supposed to have dinner with. i ended up avoiding my bf for a whole week.