He'll be gone for a week...
From another guy's perspective, I would say he is seeing another woman. It's a classic tactic to switch the phone off because the last thing he needs when he's with his other girlfriend is text messages or worst, phone calls from you in front of her. So when he has to leave his girlfriend on his trip away to buy milk so to speak, he disappears for an hour, calls you and pretends he's having this amazing alone time, finding himself, Hello!!! He's a guy on his own on a holiday with his phone off. Think about it, his brain will be going crazy as he gets horny, and he will be texting girls or better, hoping they text him to boost his ego, what guy turns their phone off, guys want to feel in control and have their ego boosted by girls chasing them. I'm telling you he is with someone else, plain and simple. He's not telling you in case it doesn't work out, then he has you so he's not single and he has told her for the exact same reason.
Play hard to get. DO NOT text him, women can't resist this urge to text. It's a game, so don't text because he will notice and start to panic and he will start to chase you. Then when he does tell him you are busy, avoid seeing him, but still be nice, pay him compliments, stroke his ego, but do not see him and watch what happens. Eventually see him, have sex or whatever, but then again say your busy, can't see you, going out witha friend etc and watch the relationship turn in your favour
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