Don't be afraid to talk!
I know many couples, who would prefer to discuss their love problems with their friends than talk to each other about the kind of things they don't (or stopped) liking in their relationship.
Your friend can give you some sort of advice for sure, but your friend doesn't know your partner as good as you know him/her. So the best thing to do is to talk with your love about problems you have. You can be surprised that your couple didn't even notice this problem before you mentioned it. And that is normal, we all need to understand, when dating a person, that he/she can never predict our thoughts and actions, so your partner can never stay perfect in your eyes, and sometimes do kind of things that you don't like. Don't keep silent, when your couple does smth you never liked, don't scream at him/her or argue, calm down and explain to your love why you don't like that, and why that thing is so important to you, ask him/her why he/she did that (or keep doing that), find the solution of the problem that is good for both of you.
Just don't be afraid to talk! That is how you build healthy relationship.