Engaged

I think there is more going on here that meets the eye. If you have a wedding date set it's time to postpone it. There is absolutely zero need to jump into a relationship as legally binding as a marriage. It costs on average $20,000 to go through a divorce process and divide the assets. Marriage is a contract based on an abstract idea of love. If he's not meeting or triggering your concept of love then there might not be reason to marry him.
This is where it get's complicated. Did you love him? Why did you stop loving him? Is it just about the not being romantic or trying hard enough? Is it that you love him but don't like him? The age difference could be part of the problem but is it the whole problem? Obviously you're in slightly different places in your lives when you graduate from nursing school and on more of a stable place in your life how are you going to feel about him?
If he died in a car accident tomorrow how would you feel? Morbid I know - but sometimes we don't recognize the love we have as a reality until we threaten ourselves with taking it away.
Hope this makes some sense to you feel free to buzz me a message if you're confused or want to talk.

Thank you for responding, I really needed that. Your post has definately given me some clarity. We were planning a wedding for this August but I cancelled the plans because I was going to be fully responsible for financing the wedding which has caused a lot of anxiety and also to "focus on finishing school" aka stall before I'm stuck. I do love him very much. I would be devastated if he died. I just don't feel romantically in love. I am in lust with him though and I don't want to lose his companionship. I just feel like I need more. I do feel like I would prefer someone closer to my age but men my age aren't ready for kids and marriage. I don't know how I'll feel once I've graduated. I am baby crazy though and I would love to give my son a sibling ASAP, because my son is already 3. I feel like I'm marrying for my son and I would give up everything in life for him, I'm just nervous about missing out on a deep connection and perhaps romantic satisfaction.