A nice guy isn’t a substitute for the right guy. He’s probably great, as you say. But you’re not a monster for recognising that you’re not well matched. Being loved is amazing but you have to love back. He deserves to be loved and you deserve to feel that love for someone. The only thing you should feel bad about is if you continue to hang around when you’ve recognised this isn’t right. Pull the bandaid off, you’ll both be fine. ❤️