its a shame your friend stopped talking to you. could it be something else came up?
i have lost many friends the same way. i simply overwhelm them. they dont know how to handle the news, dont know what to say. i let them go. i have found trying to make it better, i only overwhelm them more. but i dont attach easy so it is easy for me to let go.
give it time and try contacting again. see what happens.