Relationship Issues

I've been with my boyfriend for almost two years and he refuses to talk or think about marriage. Not just that, he won't watch tv shows that have to do with weddings and gets embarrassed at every engagement picture he scrolls past on Facebook or photo of a promise ring. I know we haven't been together for that long, but he's utter avoidance makes me feel kind of like I'm wasting my time with him. I love him with all of my heart, but it hurts sometimes. Any advice on how to deal with this?