sallyann16 - you are reacting normally at this early stage in your break-up - picking over details and wondering if the whole thing was worth all this time, and now this agony.
This is not a good process to follow - what good will it do? yes, you think you will feel better for knowing if your man has been a liar, but that just feels like it will make your grief and loss easier - it won't.
Part of a relationship like the one you have had is agreeing to close off certain areas of his life, and not explore them - however tempting that feels now. It will either leave you feeling even more hurt, or hurt just the same. What it won;t do is actually help you to feel any better, and anything that doesn't help is to be abandoned right now, you need all your energy to get through the days, don't waste it on analysing and hurting yourself more, it's no good.