US Tourist Visa advice

[ashkya5]

Here's my story I've been in a long distance relationship for 3 years now, I'm an Indian passport holder with a US employment visa (H1B) and my partner is from Peru she works as a school teacher, her parents and entire family lives there (stronger ties to home country), I have visited her about 3 times in the last 3 years, we have been planning for her to visit me (3 month stay) for the last couple of years, finally managed to get an appointment next week for a tourist (B1/B2) visa, we want to know any tips regarding what kind of questions we can expect and will referring to me as her boyfriend will help or hurt her chances (I read in some posts here that showcasing stronger ties in the US might actually face rejection) if someone who has already gone through similar situations could you please share your visa process experiences, would presenting a roundtrip ticket be enough to convince that she doesn't have plans for permanent stay in the US, we really want this visa approval to go through, long distance like for everyone else it's been a struggle, so any tips or advice is welcome .