Should I break up with him?

We've been together for over a year and I do enjoy spending my time with him. We can laugh together and we really have a good time.

However a few months back he got involved in things he shouldn't have. He started shoplifting with a 'friend'. They got caught and he's since stopped I believe. He also used to smoke weed with this friend and I feel as though his friend was just using him, even though he couldn't see that. He also lost my trust by messaging another girl, even though it was quite