A general comment: you seem to really like touching your opponent's stones to attack and/or make territory (e.g.,
, 
, 
, 
, 
, 
). One of the characteristics of players a few ranks stronger than you is that they do this a lot less. Touching your opponent induces him to respond and make himself stronger; as a result, he will become harder to attack, and if you had to reach out to touch him, you will find that your stones are weaker by comparison. Something to think about as you self-review your games.