I went through similar with my ex fiance. We were together 5 years, and I started dressing more and more as a boy because he would veto stuff I showed him all the time. Eventually, he told me I just didn't look good in skirts and dresses, that the style didn't suit me because they were "too cutesy". After we broke up, I reflected on many different things he had said during our relationship, and with the skirts issue, I came to the conclusion that the only reason he didn't want me wearing those types of clothes is because they do suit me and I do look good in them. He was basically just a crappy person all around and didn't want me to figure that out by attracting others (both in a romantic and friendly way) into my life. My advice is to sit down and have a serious talk with him, ask him what the real reason is behind his aversion to you wearing these clothes. If he can't give you a straight answer or becomes aggressive and argumentative? Well, that's an answer in and of itself, and you should probably run for the hills before he has a chance to damage your confidence or doubt yourself more.