My wife filed for divorce but I haven't been served?

My wife said she was going to file for divorce the first week of Feb. She did not actually file until April 16th. She has not had me served yet. We have talked about it and she has asked me when I will be around. I have been very cooperating with her but she has yet to have me served. We have a son together so we do speak. I DO NOT want to divorce and will do anything possible to save the marriage. My question is this: Does anyone think she is having second thoughts? She has invited me to hang out a couple times and we even went to breakfast this weekend. She asks me about things in my life like how was my job interview, etc. We have been separated since Jan and for the first 4 months I was the begging/pleading person. For the past month I have moved on and only speak to her about our son. I DESPERATELY want her back but I realize it needs to run its course. I am just looking for some in site on this situation and maybe some advice. I believe in the sanctity of marriage and will stop at nothing to salvage this marriage and family.