I've been dating this guy for almost 9 months. He's super sweet and genuine and overall the most amazing guy I've ever met. However, my feelings for him have been fluctuating. One month I'm so in love with him then for a week or two the love feels like it's almost gone. He always talks about how he sees us spending our whole life together and having kids and that really appeals to my hopeless romantic side but at the same time I feel suffocated. I would feel horrible if I broke his heart. I also sometimes can't stop thinking about my ex, not even in a "I miss him" way just in a thinking about him way. I automatically feel guilty but also as if I wasn't ready to get into a relationship. But sometimes I don't think about him at all and it's fine. My mind keeps going back and forth from thinking about my ex and having a small desire to break up to not thinking about my ex at all and being so insanely in love. I'm not sure what to do.