“I guess this is a classic to the point of being trite, but how do I know who (if anyone) is right fo asdfadsf ”

I guess this is a classic to the point of being trite, but how do I know who (if anyone) is right for me? Was the long term relationship (7 years) that I ended really bad, or was it ended b/c I wasn't willing to give enough to the relationship?nCurrent love interest - I don't feel that excited about but is it because I'm not willing to just dive in & give everything or is it really not right. I can't just know when its right.