OK, please remember the usual health warnings. This is just my interpretation and it's probably got wrong bits in it but I hope you'll find something in it that connects to why you had this dream. We can develop the themes through dialogue if you like as external interpretations are rarely accurate but frequently close.

The first part seems to connect to a feeling of embarassment/shame. A part of you (manifest as piano teacher) wants to "fix" the conscious part of you that's indulging in the internet.

The second part brings to my attention the similarity between the words "rap" and "rape". If so perhaps the first part relates to your embarassment/shame about something sexual or just generally about the feeling of being (ab)used. The friend in the dream is also a part of you - a part that you're wanting to connect with so desparately that it's manifesting as your crush. Yet you find it hard to connect owing to this feeling of being raped (probably metaphorically).

Collectively I'm also struck by the need to connect to this "friend" inside you brings you to the internet and through that connection you're getting this rap(e) message. I think your inner/lost/repressed self is feeling extremely vulnerable owing to it having been hurt before in what now feels like abuse.