Communicating is hard, but the only way to get to know others and for them to get to know you. Not communicating seems to have landed you in the same place of being worried what others think.

We can't know what others think unless they tell us. We only know what we think. You have decided they think one thing, but that comes from your worries. In truth, they may think you like solitude, being apart rather than being a part. They may be respecting that about you. They may have the wrong impression and you can change that by communicating more, knowing that your communication is your communication and is about you... and knowing that their thoughts are their thoughts and not anything we can guess or control, because their thoughts come from within them. You can relax and be you, knowing you have no control over what others think

Has this person who interests you said something to make you believe he thinks you're strange?