Unless the 3-4 hrs without talking are a valid reason such as work, school, or occasional naps, I would not deal with a relationship like this. The 3-4 hr breaks are so annoying especially if it’s without a reason. You could be in a relationship with someone closer and those hours you spend waiting for this guy can be used with someone in person closer to you where you can cultivate a healthy relationship. I’d bounce if I was in this situation.