Greetings Nicky,
I told my wife about my crossdressing over a year ago, after more than 30 years of marriage. Not an easy time, but we still love each other and remain committed to working through any thing life brings our way.
Like your wife, mine suggested therapy, which I took as a great sign. My wife never seems to be looking for therapy to stop my dressing, but to help me become more at peace with my self. I have tremendous guilt, shame and secrecy built up over many decades. So as one of the previous posters mentioned, I believe it is very positive that your wife wants you to see a therapist.
You can google search for therapists that are interested in lgbtq and gender issues located in your area. I could not find a therapist that specifically listed crossdressing as an area of interest, but the one I chose has other clients that crossdress to various degrees. A good therapist should be able to help you at many levels, but most importantly in communicating with your wife.
I also wanted to reinforce something mentioned in a previous reply, GO SLOW! You have likely been dealing with your emotions internally for a long time, in my case it was decades. By the date of your post, it seems your wife has only known for week(s). It is a big emotional adjustment and I believe takes a long time. My wife and I are still working on the communicating part, so I think our real adjustments are still ahead.
I hope I've been of some help and comfort.
If you would like to discuss more feel free to pm me.
Hugs,
Bobbi