I think Erynn makes an okay friend, if a little naïve and seems to have a really hard time telling people no. I also think she makes a terrible girlfriend for the same reasons. She falls for Ethan's shit time and time again and once she's finally realizes he's a classic douche, he's got something on her and is trapped. Of course, being the intelligent, mature person she is, she's gonna deal with it herself, and not involve anyone around her, like Melissa. Melissa knows what kind of damage a sex tape could do to Erynn, no matter the field she was trying to go into.
Alexis checking on MC after the confession was sweeter than almost anything Erynn has done story wise. Erynn showing up later to check on MC after he starts avoiding her (how much time passed?) is just her being too little, too late. Of course, we know from the letters she wrote that she did make a considerable effort to try to patch things up. It still doesn't scream romance to me at all, it's just a friend missing her other friend.
The only time I see what I'd consider romance with MC is the photoshoot, where it's a forced interaction (you make the choice as the player, but if you're interested in Erynn, you're not gonna leave her hanging here). All the other times are the MC taking a step (or the rare case early on where she makes a move and it's a huge mistake to accept it) and then getting frustrated sexually because she can't reciprocate.
