Hi Kimjo,
My loss was different to yours, I lost my mum, who I lived with about a year ago. so I can relate to your feeling of being isolated and alone every evening and weekend. I don't have much family and those I do have live a fair distance away, so I don't see or hear from them much.
As Karena says, I don't think you can rely on family to support you. They have their own lives and their own grief to deal with. Nor can you do much to help them with that. Everyone has to find their own way through. For myself, I felt I needed to get out of the house and amongst people again to help myself, so I joined a class and took up a new interest and I found that this really helped and continues to be the best way of helping myself cope. It forces you to think about something else for a few hours a week if nothing else and lifts your mood. It will take a very long time to come to terms with your new situation and only you can really find out how best to make that work for you, but you do have to give yourself the time to do that. I took a little time out from work about six months after my loss, as I found myself at my wits' end around that time and needed the break as the pressures of work on top of the grief were just getting too much to bear. The time away did help, even though I spent most of it in a state of meltdown! Reading back over my diary now, I can see just how bad a state I was in and I shock myself, but despite that, I can also see that it has gradually got better and that that is largely due to the conscious effort I have made to try to help that to happen.
Time may not heal and this lonely road does surprise you. You will find that those you might have expected to be the most supportive may not be in actual fact and that sometimes those from whom you might not have expected any support turn out to be your best sources of support! I did.
Either way, it does slowly get better and Karena is right, it does help to carry the one you have lost forward with you by engaging in interests you might have shared and enjoyed together, to revisit old haunts and new ones or new things you might have always intended to do together. It isn't the same, but it does bring back happy memories that help to obscure the painful ones. In time, you will learn to adapt to this new normal. It sounds like you have a positive attitude, but perhaps you need to take some of the pressure off yourself, accept that the people you might have expected to support you best may not be those who can in reality and find a different source of support instead. You probably need to allow yourself to feel whatever you have been blocking out to support them too and let out your feelings in whatever way helps the most, whether that is writing it down, crying, or just whatever you think might help.
Sadly, loss is fact of life for everyone and always has been. It will never be easy to deal with and you will not get over it, but you can learn to live with it and to make a new life for yourself in your new circumstances, but you will only do this over time, so allow yourself that.
Sending hugs!