The problem with mix gender platonic relationships is that they often blur the lines of what is friendship and what is romantic. For a lot, if not most, there are just some things you do and say that are only for your lover. Kissing on the lips, certain touches and hugs, sex, and some expressions of love. Saying "I love you" is one of those. Perhaps they may be the fault of the English language, but "love" does have all sorts of meanings. Like you said, you love your friends. It's not unusual. People love their families. Their pets. Their cars. But the meaning can be misinterpreted if said to another male. And I can see where your ex is coming from. As I'm sure you would feel insecure if he said it to a female friend. Don't lie, you would. It's human nature. We all would. All these actions that blur that line are fine when you're single. Half the time they're covering up for deeper feelings anyways, whether one-sided or not. But once you enter a serious relationship, yes, compromises and changes do have to be made. It's the commitment to the relationship. I think some people fail to see that when you're in a relationship you're not single, so you can't act like you are. You are now sharing your life with someone and both people need to readjust their lives. If you're not willing to make little changes here and there, then you're not ready to share your life with someone because honestly, this argument that you and your ex had is petty sh*t.