Can your personality be actually influenced by your partner too?

For instance if you're stuck with a bad or controlling person, they can bring out the worst in you. Suddenly you can become a nasty person too; total opposite of how you were raised like. In some cases where it has gone too far, it can even make you hate your partner and think of getting back at him/her.

However, if your partner is a great person then you can even be motivated to work on some of your flaws and better yourself... bringing the best in you. If you were already a decent person then you keep that and don't change.

Overall, can they actually influenced you so much that your personality even varies?

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For instance if you're in a relationship with a confessed scammer, all of the sudden you become a scammer too... even though you've never in your life scammed people.
Can your personality be actually influenced by your partner too?
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