How to tell him that I'm unsure he's the father?

how do I tell my boyfriend that I'm unsure whether or not he's the father. he's away right now and hell be home soon. but he is so excited. I just don't know what to say. I usually write him and he is too excited.

You need to just sit him down and tell him and be honest. I mean he will understand. If not then he is not right for you. You cant plan what your going to say. It all will just come out when you start talking