@Fitmum01,
Well, you're right that you shouldn't have snooped, but it's out in the open now.
The boredom excuse is really frustrating, isn't it?
Before all of this, what was your relationship like? Were you together for a long time? Talking about kids and planning for them, or this an unexpected pregnancy? What were your plans for after you give birth?
I am asking those questions because between the two of you, you need to sort things out. Whether you remain a couple or not, your child will need care, clothes, a roof over their head, medical care, food, and hopefully some savings for later. Eventually, they will also need schooling, etc. But let's just concentrate on the first three years after birth for simplicity's sake.
So you two need to talk. Less about your relationship and more about how you are going to assure all of those things for your child. Will you go back to full-time work after your maternity leave ends? How will your child be cared for when you do - will care go full-time to your BF (not to say he would not be doing any care before), or to someone else? Or will you take off more time and your BF would work? Or do you have enough savings for everyone to stay home?
Where will your child live? How will their needs be met financially?
If these things are not squared away, make them a priority. This is a priority beyond whether you remain a couple.
And if you do choose to walk, make sure your BF is still involved with your child's care. That means working out custody/visitation, and also $$. No matter how you are feeling, your child will need shoes - and they will also need their father.
But first get the nuts and bolts worked out before getting into the nitty gritty of whether you will stay together as a couple.