Hello....there can be many reason for your problem...
Firstly it may be that you are afraid of these problems because you had a very bad past.....and you don't want it to repeat it
Secondly you are geniounly trying your best and his relatives are actually causing you such severe stress
What ever the case is ,,,it is better you talk to him about your problem. If he understands and take a stand for you and try to manage these problem , than you can continue with him and be calm and happy and if he does not help you even now then he will not be able to do it later and you may be falling for a wrong guy again. When all these problem get resolved you may spontaneously come out of your sad mood. If it persist than you may need to consult a psychiatrist
and get yourself evaluated for need of treatment.take care