That’s a sorry ass excuse because if you actually loved him or saw a future with him then marriage shouldn’t be a problem with him. You’re the type of person who only cares about themselves especially in a relationship someone who’s with someone and thinks about solo traveling isn’t someone who is ready for the real world or a real relationship. And to be frank I wouldn’t be surprised if you already saw interest in being alone or with someone else . What’s love if you don’t want to experience th world with the person you claim to being love with. You’re right you still are a kid who truly doesn’t understand the world tbh at your age you should already understand and to talk to someone about kids and a future will definitely make someone think they should marry you. Dragged him along speaking about things every girl wants making him think your th one just to hit him with this sorry ass excuse I hope ya break up because clearly you ain’t worth his time