Did I word this right as a female best friend

So I know a lot of people on here have issues with male/female friendships, but I've been friends with my bestie since age 3. I ain't going anywhere. But I do try to be mindful of his relationships. I do not like his girlfriend, well "fiancé ". Before you jump down my throat on how I put fiancé hear me out. Me and him are 18, his fiance is 24. Theyve been together a year and she pretty much manipulated him into proposing and she wants to get married in September and start on having kids. He got into Princeton. An Ivy league school and he can't go now because she wants to do all this. Honestly I kept my opinion out of it. If he wants to go do that, its his choice. But yesterday he was going and he asked me if I felt like he was making the right decision. I asked how he felt and he said he did want to go to college but he loves his fiancé. He asked what I think he should do and I said "Do you want my honest opinion?" He goes "Yea" so I said "It's Princeton. Go! If she truly loves you she will want out you to go take this opportunity. And she'll be waiting for you when you're done with school and then you can get married and have all the babies you want". I didn't want to bash her. I just wanted to give him some friendly advice and what I think he should do. Do you think I worded everything okay and respectfully.