I don't think there is a "step by step process" to this one...you two will either still be interested in re-building your relationship after the 3 months is over or you won't. Or one of you won't. If it's she...the only thing to do is change your focus to other important factors in your life. Friends, carreer, passions, etc.
There are no certain ways to rebuild relationships with guaranteed results.
But I do know that focusing too much on one another causes problems. Like feeling a loss in independence/freedom. Even in awesome relationships. Each person needs to remain seperate in a lot of ways. Such as hobbies..personal goals...
If you love your self and your own choices...so will others.