He wants to wait to have sex???

So we've been dating for over a year and a half, and sex has been a constant issue. My previous relationship was abusive, so I wanted to wait and so did my bf. but I guess sex turned his last relationship to shit (the chick used it as leverage against him, and it consumed their whole relationship), so when I told him I was finally ready about four or five months ago, he said he still wanted to wait. It's caused a few arguments since then, and he always says he's not changing his mind, at least until I go to college and we have a place to do it with no interruptions. Am I doing anything wrong? We've been naked in front of each other hundreds of times and done literally everything except sex, so it's not like he's insecure about anything. I don't know what to do.