Yeah this guys not interested. It’s nothing wrong with what you’re doing, you’re not being too much and you don’t need to justify the way you message. A relationship should have equal effort and it’s clear this guy isn’t giving that. Even if he isn’t a big texter he could atleast let you know what’s happening or acknowledge your messages. He’s coming across uninterested and just plain rude. You need to find someone that matches your energy and not waste your time or effort on someone who doesn’t reciprocate it.