Good times and bad times go hand in hand. You can't have one without the other. If you think about it, they actually do complement each other. The bad times of course make you wish you'd never have to see them again. But at the same time they make you appreciate the good times. You learn not to take anything for granted. You learn patience and you become stronger and wiser. Virtues like these come at a price. That price is in the form of tons of sacrifices and difficult choices. But since right choices and difficult ones are often the same, they work out well for you in the end.
In a relationship, you have someone by your side through everything. And when you share everything with someone, your connection becomes deeper and stronger.
But there are going to be difficult times in your relationship as well. The ones you're afraid to talk about because you don't know what sort of a reaction you'd get in return and what it'd do to your relationship. The good stuff you can talk about very easily. But what about these bothersome things? If you feel safe in your relationship, no insecurities that is; then you can talk about the difficult things as well. You know its not something your partner would want to hear, but you also know that they'd be understanding enough to not be offended or hurt by it. Instead, they'd make sure you never have to feel the same way ever again.
1. You get worried
The initial phase is all about constant meet ups, and calls and texts and what not. The frequency does reduce over time. But it should worry you if it's been too long since you heard from them. Also, there's nothing wrong with contacting them if you haven't had a text or call from them in a day or two. You're rightfully concerned, and they should know that too. Regardless of how long you've been in a relationship, something like this should always worry you. The concern isn't of an insecure nature. You could simply be worried about something having happened to them.