Any Relationship Needs Attention.

I don't know where the above saying came from but it's so wrong, and just seems created to make people feel better for not putting time into a friendship. You can't just spend your attention elsewhere and think that you have a deep or best relationship with someone you rarely talk to or spend some sort of time with. You begin to not know one another as you both grow into different people through experiences and understandings. You don't need to spend tons of time a week on a friendship, but there does need to be Some Time and Effort. Otherwise you're just remembering a relationship you had instead of being in that relationship currently. You don't get good at something by not participating in it - whether that be your job, playing an instrument, learning about a subject, or Being A Friend. Evaluate & refine.