For example, if we are video calling at night, he would multi-task and scroll through social media. In the past I have told him that if for 15 minutes he could just pay attention to me. He thinks it’s not a big deal and I am just over-reacting and being too emotional about it.

Lost soul,

I’m glad to hear that, even though he tells you this is a big deal and that you’re overreacting, that you realize that you aren’t overreacting. Asking someone to stop scrolling through their social media and focus on you for 15 minutes is not at all an unreasonable request.  If that’s how he responds when you ask him to do a very reasonable thing for you, he definitely isn’t a good guy to date.