Not getting along. Does that mean you don't love this man and he doesn't love you? Does it mean he doesn't pick up his dirty clothes? Or that you don't go out on dates like you used to? Decide what are the specific sticking points of why you're not getting along, and talk to him about them. Divorce is not an easy experience. If you can try to save your marriage you should.
I would be honest with your spouse, that you need help with your marriage, and that you both need to want to work on it together. If you get no response, or he resists wanting to work things out, then separate for a while. See if he changes his tune. It takes 2 to make a marriage work. If both parties aren't willing, there's no fixing it. Use direct, open communication. No beating around the bush. Marriage can be hard. But, divorce can be 100 times harder. Don't take the decision lightly.
Lots of information needed so we can point to things that might make you help make your decisions.
How long have you been married? How many kids? Do you work? Does he? Are you needing alimony/child support?
Is he cheating? Beating you up? Drinking, gambling away the money? Are you bored, depressed, lonely?
Do you have family nearby who can help you talk through this? Have you had marital counseling?
For some people, divorce is the way to go, but for others, reconciliation is possible. There's not a chance we can let you know whether your concerns are the type that usually point to divorce or usually point to working things out, unless we have more information about your concerns.
Pam, sorry you are in this situation but like Gigi said we need more information. You will find good support here either way you decide to go. You will never be alone here.
-------------------- I'm a living sunset... there's light in my bones. You can push me to the edge, but my will is stone!