How to move on after this?

I have been single now for nearly five months now, the longest I have been in a long time and it has been difficult. My situation is a bit odd and recently become even more so. My boyfriend and I broke up due to him dumping me after he had been talking ton and seeing his ex behind my back for a while. Long story short we have been trying to be friends and continue to be roommates ever since, we are better friends than we were partners. Even though I know that it's for the best it has been difficult to get over him and what he did, let alone to move on and accept that he will be seeing other people. I have been trying but it isn't as easy as I would like. We kept having sex longer than we should after the breakup as well and even though I was on the birth control patch I somehow ended up getting pregnant. Due to reasons I have fro previous relationships and other reasons I have done a lot of thinking,both of us have talked it out and we've decided to keep it. We were planning on still being roommates anyways which was complicated and now were going to be having a child, none of which is ideal but it is the right thing to do. I just want to try and get over everything and put it all behind me, accept the new way of things with him and I so we can be friends and do this together the best way possible...any thoughts?

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