気になってる is the progressive → te-form of 気になる

1. Expressions (phrases, clauses, etc.), Godan verb with 'ru' ending

   to weigh on one's mind; to bother one; to worry about; to be concerned about; to care about; to feel uneasy; to be anxious

   気になる男性の性欲を刺激するにはどうすればよいのでしょうか？

2. to be interested (in); to be curious (about); to wonder (about); to catch one's eye

3. to feel like (doing); to feel inclined to; to bring oneself to (do)

   usu. after a verb