Therapy is great and couples therapy is only there to guide you both to clearer communication so don't expect those sessions to offer many solutions, just insight (if it's the type of therapy my H and I did)
If you DH is willing to do the work (and isn't hung up on somebody else, as mine is) then, yup, you guys can work this out and it'll be up to him to do a lot of the work to reassure you and regain your trust while you will be doing the biggest emotional work to choose to trust and stop regurgitating the past and focus on the present and the future.
VERY good that you are planning. Becoming less dependent on him will help you tremendously.
There are great books out there and I have a few still waiting to be read (like who the heck has time???? --or the emotional energy to absorb any of it when there is time. lol) But one book that has helped me a lot os Mars&Venus Together Forever. I wish I had read this years ago! I tried reading his book Men are from Mars and Women Are From Venus but just could not get through it (maybe eventually I will be able to--not sure why I couldn't sink into it)
But the Mars&Venus Together book, read the intro, skim the middle and jump right to the end where he offers how to go about keeping things happy in a marriage. Then skip back into the middle to understand more if need be. It's a good read and I read it from start to finish but found the middle a bit repetitive and perhaps it's because I was in a rush...
Other good books:
(keep in mind I am still reading them)
Hold Me Tight
5 Love Languages (or maybe it's 5 Languages Of Love)
I have others but can't remember their titles just now. But that Mars/Venus book, excellent.
Good luck and I hope you can work through this and come out the other end a stronger unit.
Julie