I don't find your posts irrelevant at all SS. I think you have very good communication skills. I for one don't always respond as much as I'd like or as extensively because I am feeling very tired and depressed. That's not a reflection of the quality of your posts or anyone else's. Maybe you're a bit too hard on yourself? You said it's not a problem in the offline world. that's a really good sign! It is much harder to connect with people via written word only versus in person. if you feel like it's going well in person, I think you've nothing to worry about.

Keep being yourself. You are good as you are!