If you decide to leave
The first step in escaping an abusive situation is realising that you're not alone and it's not your fault.
Before you go, try to get advice from an organisation such as:
If you're considering leaving, be careful who you tell. It's important your partner doesn't know where you're going.
Women's Aid has useful information about making a safety plan that applies to both women and men, including advice if you decide to leave.