The correct response is:
It suggests that Framton is slightly self-conscious about his shyness.
This interpretation is supported by the tone of "distinct regret" he uses when discussing his knowledge of the local people. Framton's reluctance to engage further and his focus on his sister's past connections indicate that he feels somewhat out of place and may be uneasy about forming new relationships, which aligns with the idea of him being self-conscious about his shyness.