After confessing to a divorced female colleague, she didn't reply, didn't return messages, and didn't answer the phone.

I don't know how old you are as a female colleague, but a woman who has been divorced at least twice should still have problems in many aspects, otherwise she wouldn't have done such an immature thing. On the other hand, if your female colleague has experienced two failed marriages, then she must have suffered a lot of psychological trauma and need time to repair it slowly. This shows that you are too straightforward, and you should tell her face to face, so that you can see the change of her expression and the success rate is relatively high. This also shows that you are sincere. You were too impatient to tell her on the phone. That's why if you like her very much, you want to.