Accept the fact and not worry about it
Accept the fact but never treat him/her quite the same again
Suggest therapy to change his/her ways
Suggest couple therapy to help you to cope
Break off the relationship but hopefully with no hard feelings
Dump her/him right away
Find out his/her feelings on trios: hey the more the merrier!
Big Five Personality Test
Want to gain a greater understanding of who you are? This test measures the famous "Big 5" personality traits.