There's no good reason why you can't feel sad for you. Women are often caregivers and as such tend to feel remorse whenever anything goes wrong. It won't work. Yet you may need to discover that it won't work on your own. Some of this wrestling with remorse is part of the process of grief, so wrestle for a while and then let it go.
Anger is another troublesome emotion.
It must be acknowledged, ventilated and then turned loose. Sometimes we find that we find that we're no longer comfortable with our old circle of married friends. This can be confusing and hurtful. Even friends who deeply care may not know how to respond to our new status. For many widows this is perceived as another loss.