Whatever it is that you convey, others (both human and other animals - and some may argue...even the greater energy of universe) can readily "pick it up" and feel its effects. Having others look forward to your presence and feel comfortable around you is not always an inherent trait. It can be, rather easily, learned if you're willing to spend the time to open your mind and heart to understand you strengths and overcome your weaknesses.
The first step is to understand who you are. "Look" at yourself when you converse with others. How and what does your tone of voice, body language, content of your message, and use of words, convey to others. Step back and watch yourself. Are you a person who displays the type of energy that evokes positive emotions, or do you repulse others and cause them to rapidly move away, physically and/or mentally, from you. If you are too judgmental, it can be relatively certain that those around you will "turn you off" after your negativity has been on constant display.
The easiest way to have a positive effect on others is to listen to them. We live in a world where listening has become a prized commodity. Since so many of us are pulled in an ever increasing amount of directions (see my previous post), our ability (or desire) to listen to others has - from a societal perspective - been stymied. Showing that you are willing to listen non-judgmentally, and REALLY actively doing it, can create a positive effect on how you are viewed and...make you one of the people that others want to interact with.
Listen and you well, most certainly, see.