My cousins boyfriend is annoying

So me and my cousin for the first time starting attending the same High School together. Me and here are really close, and she's like the sister I never had. She tells me everything. So her boyfriend is annoying, geeky, and so sensitive. It's like my cousin is dating another female. They've been together for like 2 years now and I think that maybe one day they may just be married, and shes pretty settled. She's only 16 and acts like a fuc*king housewife. We can be walking together, and he'll come out the corner and just deserts me. He can call her and she'll just move like a puppy. He also is sensitive and likes a female, and takes stuff to emotionally. They can message each other and he gets so offended and he start acting like a female dog. Honestly I don't even wanna be around him like that. He has even starting calling her by his last name. I don't think that they should jump to conclusion, and I think that she should'nt tie herself down so soon, and assume marriage at such a young age. Don't be a hoe or anything, but find out about yourself, but am I wrong for the way I think. I want my cousin to be with a manly man, thats not so sensitive. I don't like when he calls her by his last name, and his family members talking bout that's my daughter-in-law. Am I wrong for the way I think.