As a guy, I like noises coming from the woman I'm trying to please. It means I'm doing a good job. Fake noises, however, can turn me off so much that I stop the intimacy altogether. ..
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"Don't fake pleasure. I would rather be ineffective than deceived."..
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If the noises are natural, and not faked, I don't think any guy will have a problem with them...

I've always thought of noises as aural encouragement and positive reenforcement (if you want to think of sex as training a dog.) Why don't you ask him? If it really bothered him he would care enough to tell you...
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Anyway, I only make small whimpering noises. One guy called them "little lady noises," which I thought was cute. But personally I love it when a guy moans...

Many, many women are loud. It's perfectly natural to express your pleasure that way and no one should make you feel bad for it. ..
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Unless there are people in the next room that you need to have consideration for, I say, let it rip. I do! ..
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Since you are concerned about your boyfriend's reaction, however, I would suggest talking to him about it. I'd say something like, "It feels so good when you ... I just can't help but show you just how great it feels by moaning and making other noises." I wouldn't apologize for it, however. You really have nothing to apologize for. ..
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I think most guys like moaning. It's a verbal sign that their woman is feeling pleasure and that is a compliment. I know my husband loves my noises. For that matter, I love his noises...