You are still early on but it sounds like you want to R so you might want to read in the reconciliation forums.
And why was he reaching out in an email to an old gf, telling her he will always love her? Have you talked to the old gf to find out if he has made any other contact with her and also to find out why their relationship ended? Did he cheat on her? If you are considering staying in this relationship, I would recommend making contact with these women and seeing what they have to say.
What you know is that he has engaged and has attempted to engage with other women - when you were supposed to be in a committed relationship. This is never a good thing. This is a red flag. There could be more that you do not know about and unfortunately, there is no way to successfully monitor his activities because there are ways to get around this, if a person is inclined to cheat.
I'm very sorry for you. I know how hugely disappointing this is, but it is best to know just what you are dealing with now, rather than later. I think you have enough already to move on. He has betrayed you and he has broken your trust and trust is the foundation of a committed relationship.
Stay strong and keep posting. You will get lots of support and very good advice.
I don't know why he is the way he is, but your WBF needs external validation, and he doesn't know how to have one strong and authentic connection with a partner. Other women are pawns to him.
I know I sound jaded, but i went through a false R in which I was told a lot of things about how much I was loved, etc etc, and in the end he was STILL lying and cheating during that time.
Some people are just very broken and very dangerous and the signs here point to your wBF being one of them.
How did he end up moving in with you, out of curiosity?
Right now, take care of yourself. You mentioned he was in IC, you might consider it for yourself. While you have had a "whirlwind" 6 months, he has had an emotional affair at least twice on you already. He has poor boundaries. Your emotions will shift back and forth. That is normal. Post here often. We are here for you.
I'm really not sure if I can do this. I'm a strong, confident woman and I don't want to obsess over what someone may be doing, and that's what I'm doing. I haven't had to deal with crap like this since high school. I just don't know what's wrong with some people :-(
He's not 'remorseful.' It sounds as though all he's DONE is try to shop for the 'Bigger, Better Deal' during these 6 months you've been with him. I guess when he wasn't able to trade up, he still had good old Cocoa waiting in the wings.
He has no remorse. He regrets you FOUND OUT and he now has to deal with the fallout of his crap behavior, but that's about it.
And honestly, how can you believe anything out of his mouth when out of the left side of it, he's proclaiming his never-ending love to his ex-girlfriend while out of the right side, he's telling YOU "I'm absolutely ONLY in love with you!"
Oh my God, what a freakin' phoney.
Look, you've been given the gift of sight at the 6 month mark. You're very LUCKY!!!! Most of us don't get that gift so early in the game - most of us are already married or financially/legally entangled or have kids with our cheaters by the time we find out what they're really made of - and by then we can't get out as easily.
You were given the gift of sight this early for a REASON. Don't ignore it.
When someone clearly shows you who they ARE, believe them, Coco. Believe them.
I promise you, if you stay with this guy, you'll be back here in the future telling us you should have listened to us because we were right. But by then, you may have married him or had kids with him or bought a house together, etc. etc. and it won't be that easy to extricate yourself.
Good luck to you.