Help me (Positive answers only pls)

So my boyfriend and I have been together for 5 months now. These last two months have been hard. We've both been distant with each other lately and constantly arguing. Mostly because I'm terrible when it comes to communication, it's almost like I shut down when it comes to us trying to fix our problems. Im also not very good at showing affection, and I know that's taking a toll on our relationship. So my question is how can I work on my communication skills ? And how can I be more affectionate ?