There are a number of reasons that Ophelia turned to Ripp that first time, and one of them was that she thought he would understand (and, at the time, believe her) more easily than Johnny would. He was less likely to bring it up again, and telling him was less dangerous from both a physical (getting his parents involved with Olive), and an emotional point of view (her fears of being rejected for all of her dark secrets).

Ophelia is very secretive over her past, and she wants to be able to live without it hanging over her. To achieve this, she has tried to keep it from both of her friends, but now Ripp has gotten her to tell him. That second time, it was partly the emotion of the situation, and she was hoping to reveal just a little in an attempt to comfort Ripp, but ended up telling him everything. She was a little caught off guard by his question, and how he directed the situation back to her.

That's right. Johnny doesn't have any major problems to bring to Ophelia, and so there is less of an equal exchange there. You can understand how Ophelia would be reluctant to delve into the depth of her problems, when all Johnny was bringing to her were petty grievances about Ripp taking too many baths.

I think that, initially, that was exactly what Ophelia was to him - a safety net - but it's not as simple as that anymore for Johnny. That doesn't mean he hasn't been taking her for granted, and maybe he's realizing that now.

I agree. There are many different types of love, and some of them are purely platonic, and always will be. I just dislike the romanticized version of "true love" and "love at first sight" as something that's either there or isn't, not something that can grow.