There are so many ways to know if a man truly loves you or not, some of the ways include:
1.) A man who doesn't respect your feelings doesn't love you.
2.) A man who abuses you physically,verbally or emotionally doesn't love you.
3.) A man who cheats on you repeatedly over and over,even after he's aware that you know of his cheating habit and that it hurts you,do not love you. There are so many ways to know this which i cannot undertake just here,i would suggest you read my hub on; "How To Know If A Man Truly Loves You" and for further advanced knowledge on this topic, check out for my eBooks coming out soon, with the titles: "How to find a good man and keep him forever" and "Signs he's a playboy". Always check on my relationship hubs for links to the eBooks. Good luck!