Help. My insecurities are getting in the way of my relationship?

Maybe he thinks you're beautiful the way you are and don't need make up to enhance it. Yet, make it clear to him its because your not that confident not that you desire attention. If he is serious about you, he wouldn't let make up affect your relationship, in the sense he would break up with you.

Try to explain to him why you wear it. Talking to him is the best thing you can do in this situation. I think if he is threatening to break up with you over makeup then he isn't serious about your relationship.

What the hell, it's only makeup... I mean unless you put tons of it on your face it wouldn't bother anyone. I personally don't even notice makeup on people nor do I care about it, and I've asked many girls why they wore make up and they told me it was because they wanted to, and liked it, not to please people specifically. I think you need to tell him that if he loves you, he wouldn't mind the make up, it's only make up, it doesn't change anything, plus it didn't seem to bother him at first. It'd be like him wearing a watch or whatnot. I think you need a talk with him, to explain what make up represents to you, and that he's got the wrong idea about it. And also, he needs to realize he's an arse for threatening break up for such trivial things... Jeez.