Help am i overthinking or is there more to it

So say you were in a year and nine month relationship and you are having a great time both happy, loving and lusting; and now for the past month have been living with him cause your family moved and you are looking for a place. So you suddenly become feeling more distant and your still loving but also more fighting a lot more fighting and feeling alone someday and nothing goes right. But still happy and trying to have good moments but no more lusting... we talk but i feel he’s hiding stuff even his mother and grandma feel something is wrong..

Help? Advice? Please and thank you

XO...O