My ex kept our relationship pretty lowkey and told me she did the same with her ex, we'd look into each other's phone at the beginning but later she said it's privacy, she'd also withhold information about herself when I ask so I never really got to know her that well, she won't tell me her phone number, Facebook account, address, or what she's working, I can think of it as an exit strategy or something but that doesn't make me want to trust her either, that led to her breaking up with me eventually since I'd get upset and suspicious every time she goes out. I don't know if I'm insecure and should be unbothered or would this be too much for anyone?