You should know that 熱情 won't last forever. Continue to 互相包容 la, everybody has his/her strengths and weaknesses. Do you still love him/her? Unless you don't love him/her anymore, love should 包容.
Have you allocated enough time to talk/chat with your other half?
Looks like you guys have some arguments. That's fine, all couples have that but did you sit down and chat about the different views/issues/problems? Stay cool/calm/rational during your chat session. Don't get mad and say something destructive!
take a long vocation together. find a place that you can relax and spend time together to rest and talk to each other and recall the good time you had spent together. and discuss about your problems in an open but humble fashion.
i agree. taking a vacation together will help (long or short, but not too short). when you're on vacation, you're relaxed (generally) and you two can get to know eachother once again.
i think you two are getting comfortable with each other, commmuication is not the issue here. You've got to a point that it is almost too boring and not worth to spend any effort or energy.
Maybe try to find something that both can do together and share the experience, like learning something new.. skiing, skating.. etc etc.. that both of you can feel the achievement and most importantly.. have fun together in the process.
If you still love each other and willing to try, it is not the end.......................