Any advice?

Hey guys, I need a little and by a little I mean a lot of advice..you guys know we girls have that boyfriend that we seem to never forget or get rid of..the so called "one", my ex and I lasted 4 years dating in high school until we graduated and started college he went to the navy and we just left it of
I got into a new relationship and basically fast forward I've been married for a year, he messaged me back in December asking to meet up and I said no, yesterday he messaged me again and wanted to talk to me and I haven't replied
I don't know if I should ask what he wants or just leave it, I know 4 years is hard to forget because we planned our lives but I'm married and now...I don't know what to do 
I'm having mixed feelings which I think is because I'm thinking too hard