Well, he is who he is. It really isn't fair to have an issue about how he is. If it bugs you too much, I suggest you let him go. Some other woman might not be bothered by it and they could go on to have a great relationship and then you can find a guy more to your liking. But someone's demeanor is not something that is fair to ask them to change. Calling him wimpy, sissy, feminine is actually quite cruel in my opinion. If you find the way he is to be a turn off, move on. It is that simple. Do it sooner rather than later so you don't waste his time. good luck
If you are attracted to him then thats a good thing. Does his personality and looks outweigh his feminine side? If so then maybe try and see if you can get over it. If you havent got over it after a while then I suppose it determines how you feel about him. Hope it works out.