So can a guy feelings change if your not a citizen of the country?

So I have been here 6 years in States and me and my boyfriend are in love with each other. I feel really ackward telling him that I'm from another country and passport of another country.I really love him but I have had boyfriends in the past being distant from me because of that. I just hope it doesnt affect how he feels about me. Can anyone tell me what to do because I genuinely like him and i really want to keep things as normal as possible.