get involved (in or with someone or something)
1. To establish an association, typically work related, with something or some organization. Johnny's getting involved with a non-profit health clinic during his summer vacation. I've gotten involved in campaigns for a number of political candidates over the years.
2. To become embroiled in some event, situation, or predicament. I make it a point never to get involved in other people's personal affairs.
3. To become emotionally, romantically, or sexually associated with someone. I got involved with Georgina over two years ago, and we both couldn't be happier! You should never get involved with a co-worker or colleague—it can only lead to trouble.
4. To become embroiled in the actions, plans, or developments of another person. Your stupid schemes are going to cost me everything I have; I should never have gotten involved with you!