First love confusion

I met my soulmate just over two months ago. We spent Thanksgiving, Christmas, and New Years together. I flew halfway across the country to meet his family and they loved me. This guy is the man of my dreams. I knew I loved him after about a day. We are very good about communicating. We are very open about what we want from this relationship (i.e. Build a family and a life together). But I also have some doubts. We aren't each other's first but we are very sexually compatible. I know I want to marry him it's just I have never been in love before and I'm not sure if this is the real thing. I can't imagine my life without him but also I am not sure if I am the person he deserves.