Truly love *Or not?

I've been questioning alot if my partner sincerely/truthful loves me. Asking because, I wonder to myself if I'm being; dramatic, over thinking, and nitpicking at nothing. My question is; How do you know if your significant other truthful loves you? Often, feel sense of sadness/hurt because, of events that have occurred throughout our relationship. It seems my partner doesn't really care. I've tried to discuss these issues and it leads no where. My partner will make excuses up *Or act as if Im crazy. That I'm making up these situations in my head. It just leads to very bad fighting which gets physical on both our parts. Please help me!