I read a few of the answers. Someone can easily have their phone disconnected or on off. Texting is not a universal phenomenon. If he goes on several dates but skips weekends or occasional weekends could be seeing someone on the side. Or seeing you on the side. There is something that's bothering you something that is making you suspicious. What is it? The final thing is your 19 years old you should be seeing another guy on the side. It's too early to commit. Now I'm not an old fogey but how do you know that this guy is someone you must commit to unless you been around.