Thank you for bringing your question to Just Answer!
You may not like this answer, but I feel I have to be honest with you. If he has been gone for three months, and hasn't shown any interest in getting back together with you, he's telling you loud and clear that it is over. You telling him you miss him will not make him miss you...and your constant contact did not even give him a chance to miss you, as you never really went away.
You are just asking for heartbreak to meet with him and "catch up." People don't "catch up" with recent ex's. They stay away from each other and get on with their lives. And if you're honest, you don't want to catch up....you want him to come back.
You need time with no contact at all to give your heart time to mend. He is being kind in meeting with you, but the fact that he didn't answer your texts has already given you the answer you are afraid of. This relationship is over. It would be better to cancel the meeting and begin the work of healing, because you are already holding on to false hope that this meeting will bring you back together. It won't.
And part of you already knows this, but another part doesn't want to accept the truth.
There's a book called "It's called a breakup because it's BROKEN" that would be helpful for you to begin the process of getting over this relationship. Here's a link: http://www.amazon.com/Its-Called-Breakup-Because-Broken/dp/0767921968/ref=sr_1_1?s=books&ie=UTF8&qid=1336388505&sr=1-1
I know this is a hard reality to accept, but the sooner you come to terms with the reality of the situation, the sooner you will begin to heal, and be open to meeting someone who thinks you are wonderful, and wants to be with you!