The rebound and the ex, how can I stop feeling too much?

So two months ago I found out that the guy who I thought was the love of my life was really cheating on his girlfriend with me for half a year. I found out, and the girl told me every horrible lie he had come up with. He had even had us meet in the hopes of getting a threesome which we both refused, and even though he said nothing bad to me about her, except saying she was an ex he was friends with, he had told her really degrading lies about me, that I was slutty and crazy and a bitch and I was stalking him. This was a person I was pregnant for at one time, I spoke to him everyday, conisdered him family and my best friend and I'd known him for 5 years and expected to have him in my life as my friend for the rest of my life. The day I found out he'd been manipulating me and lying to me for 6 months and that he turned on me and told his 'girlfriend' that I was just making up our entire relationship to break them up ... I can't even describe the pain I felt. But I didn't feel it for long. He wasn't a good guy, obviously, he had treated me really poorly when I was pregnant and afterwards we weren't together for many years, but still talked. I figured I shouldn't mourn someone so terrible and worthless. So there was someone I always had chemistry with and I gave him my number, the night I found out. I had dinner at his restaurant and told him I was single and he paid for my meal and said 'when your feeling better we'll go to dinner ' . So I didn't wait more than a few days for dinner. And it was perfect, we closed down the restaurant. And ever since that first date we've seen each other everyday. We spend almost every night together. I've cried in front of him about my ex, not held back at how screwed up I am over it. And through it all he just been patient. And after two months things are ... serious. We decided to be a couple, we're exclusive and we have a wonderful balanced happy relationship. But I find myself worrying that it's not real, I'm so afraid he's a rebound guy and I'm going to hurt him. I care about him so much but I haven't used the L-word yet. I worry that i'm never going to feel it for him, that he will end up hurt because I won't be able to return his feelings. I'm still so angry at my ex and I don't know if I can really be with someone else while I'm still grieving over how badly someone betrayed and hurt me. I don't ever want to go back to my ex, I'm not sad or wishing things were different. I see finding out as my ticket to freedom, to being done with someone awful when I deserve better but I still think about it and am so angry. Am I doing the right thing by just being with my current boyfriend, does he deserve better? I know it was so so so fast but it's been so normal and so good. Anyone's advice would be welcome and thank you, really!

you are hurt. you are grieving. you feel too much because of the betrayal. BUT somebody has taken you in..and has listened to your every sob story. your rebound guy? or your hope from the misery that someone has left you? be grateful for this person. not everyone has the luxury and the luck to find someone who would take care of you after all the sh*t you went through... let go of your past, forgive and pray for your ex. and for yourself. do not be consumed with all that anger, as you will find yourself not enjoying what you have now-- clearly you have a very good thing going but you keep on looking at your back and cursing at your shadow. enjoy now. forgive him. bless your ex for he will never know what it means to truly love and be loved. he is a lost man. so you take hold of your life and move on. you deserve it.