I would say
take care of yourself, grieve all you need, and take one day at a time
To remember not take insults personally
To remember that you tried your best
That others in your life love and care about you,
That it's ok to feel angry, confused, upset, or even wanting revenge, but that revenge is really not worth it. What is done is done and really the best way is the calm way. Leaving peacefully is better for you, for them, and for anyone else involved
On taking a break: I think this is really important before a new relationship, giving yourself time to heal and build up your emotional strength again, putting your life back in order so you can move on. . That might mean channelling your energy out into a project or sports or something similar but make sure it's focused on you and you only. Give yourself the time you need to feel better and surround yourself with friends who make you feel good about yourself.