Boyfriend ignoring me

my boyfriend at the time now fiance would do the same thing. he told me he got really busy sometimes or a Family Matter came up. I learned that instead of waiting for him to reply back I could go do other stuff. those days are the days I can think about myself you know things I needed or things I need to do instead of having to think about him. because when he finally decide to call me back. we could talk about those days catch up we always had more talk about when we didn't speak for a few days and made our relationship stronger. patience and understanding is few of the many things you have to learn in a relationship.

Something might be bothering him... Don't go ahead and ask him or do but don't push it if he doesn't want to talk about it.. instead be comprehensive and just wait till he feels comfortable to do so.. In what way is he no longer paying attention to you??? Is he ignoring your calls, is he finding excuses not to spend time with you? Is he being protective over his phone? Or is he just in his own little world?What do you think?