How to re-start sex after a death of loved one???

Dear TAM people I am coming to you with a situation that I cant figure out on my own. My only and most loved family member passed away about 3,5 months ago. Since I have withdrawn from social life since I have a desperate need for solitude. I am just going through the grief and it will take me a long time to come to therms with being alone in this world with no blood relatives around. I also have zero interest in sex. It's like I am just wanting to be alone and not bothered by anything or anyone. He is being more than patient with me but I do realize it can't go on forever like this. Last time we did it was in november last year.... I simply can't... I was wondering if anyone on here has faced the same problem and if so how did you fix it? Any perspective will be appreciated.

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