Tired? Sounds like a symptom to me really; do you get enough sleep? Caffeine dependency?
Alternatively, maybe you meant "tiring", i.e. it costs a lot of energy to engage in conversations / social interactions, depending on where you stand on the introvert / extrovert scale.
Alternatively, maybe you meant "tiring", i.e. it costs a lot of energy to engage in conversations / social interactions, depending on where you stand on the introvert / extrovert scale.