As happy as you and your spouse were together, and as terrible as becoming a widow feels, your life will go on. More than anything, you need to give yourself permission to have joy in your life, alone and with other people. No matter what you believe about what happens to people when they die, your spouse wouldn't have wanted you to be miserable for the rest of your time on earth. While you may never find a replacement for the love of your life, you will need love of some form in your life to live happily.
When your spouse dies, you may feel alone and grieved. As a widow, you should openly express your feelings as this will help the healing process which begins with the pain of loss. There is no "right" way to mourn, and no time frame for mourning. Some mourners are encouraged to cry openly, talk with others about their feelings, or write things down. You will likely feel and express a range of emotions, from anger, to denial, to shock, and emptiness.
Never let someone else dictate when you can start dating again after a spouse dies. Ofcourse there are grief periods and it can be difficult with children, but ultimately it is your decision. If you want to date after three(3) months, go for it. It is YOUR life and YOUR choice.
Don't be scared to try dating again. If it's been a long time since you dated, just relax and consider this a learning experience. Many folks have been out of circulation for awhile for whatever reason. Start slow, read some ads then respond to some and see what happens. Meet a few people and get some practical experience to build your confidence. Be on time, be well groomed and be friendly. The other person is most likely nervous too. Be honest on your profile.
You can do it!