Not really, again it hasn’t come up in the story itself, but it really makes no sense otherwise how MC rapturously declares how perfect and pure the hero is and how he needs to protect him from those *eugh* WOMEN who might hurt him (or take him away). He’ll say though it’s to keep his friend from being distracted or possibly forming ties to the Isekai world that would prevent the friend from wanting to leave.
If you’re put off by yaoi, it doesn’t show up in the story, it’s hard not to read into the meta text though.