I want to get married but worry about divorcing down the line?

I just have this theory. If 2 people love each other they don't need to get married, but that is a personal preference. I like all women dream of my wedding day and being with my loved one for the rest of my life...but marriages in the US are 50% divorcing...I would hate to divorce (unless for a certain, unable-to-stay-together-any-longer reason, as in my man's a druggie, alcoholic, murderer, gay, etc..). Marrying for life seems like a fairy tale to my generation now. Anyone else worried like me?