Married the wrong man

I am quickly finding out that my high school sweetheart that I fell in love with many years ago isn’t the same man that I am married to today. We both aren’t the same. We are not compatible. We don’t long for each other like we once did. I am regretting ever marrying him because I feel like I settled with what was comfortable. Yes I still love him. But I’m not in love with him like I should be.