The feeling of so much lonliness will pass when you put the wheels on the road again. Making that change in a few weeks will give you the opportunity to meet new people, new situations and the chance to "fit" with new people. Always when you see couples you get a longing to have that closeness that you remember sharing with your DH. It is a feeling that will always be there, that is what makes holidays and celebrations so very difficult. But when you step away from those situations and go for a walk, or change locations the feeling will pass. But the lonliness will wash over you like a wave when you least expect it. But if you weather it through, tomorrow will be brighter and a treasured moment will happen that will make you know you are on the right path for you.
Many of us here can relate to what you are feeling as we have all been through something similiar at this stage of our lives. Don't ever feel that telling us what you feel is silly as we have all felt that at one time or another.
Nan