I need help with this...should we divorce?

You can not be upset that he did not come back sooner. You put him out remember? How do you think he felt when his wife put him out the house they shared. As far as getting back together, you need to think about the problem or problems that made your separate in the first place. Is this problem still there? Is he willing to fix the problem? Has he fixed the problem? If he is willing to fix the problem or has fixed the problem, I think that you should get your marriage a second chance. Marriage is hard and working together and sticking it out is something many people can not do, and its quiet sad. If the issue you guys had is gone or can be resolved, I think that you should try again. You slept with him because you love him and because he is your husband, and I commend you for not finding another lover. Think real hard before you end this.