No, the point of that line is that he did not, in fact, told his parents about his suicide attempt.
Sorry, but this is just very poor media literacy. There are several paragraphs detailing friendly activities, concluding with “he gives me his phone number and tells me i can come back whenever i want”, followed by the “i was out with friends” line. It’s very, very obviously implying that anon recognises they have made a friend.
And yes, also, anon did not tell their parents about their suicide attempt.