You should lose the weight. You will feel better about YOU if you do lose it.
There is a huge difference between 185 and 210! It is 25 lbs and at least 2 sizes in clothing. It is 11.9 % of your weight!
These things are not meant to make you feel badly. Not at all. This is you and your health and your relationship with your partner.
While people can say, "Oh, I don't think you should lose weight for him!" I agree. You shouldn't. You should lose weight FOR YOU first and your relationship second. But I will say, I would not be as attracted physically to my husband if he put on 25 lbs. As I'm sure he would feel the same way about me. (and has when I've 'fluffed' up) While I will admit it does hurt to have someone say they aren't as attracted to you, he is being truthful. 210 is not healthy for any woman. Be healthy. Physically AND emotionally.
Don't seek sex outside your relationship. Sex is not worth it. Get a vibrator to use on your own if you need that kind of thing.
Good luck on your path.