Are two INTJs compatible in a relationship?

Yes, with caveats. Both value logic and independence, which creates understanding. But both can be stubborn, both avoid emotional discussion, both pursue external goals over relationship maintenance. An INTJ-INTJ couple succeeds when both actively choose to discuss feelings and prioritize the partnership despite their natural inclination to separate.

What's the best match for an INTJ?

Complementary types: ENFP (provides emotional awareness, spontaneity); INFP (provides emotional depth); ESFJ (provides loyalty, social grounding). Same type (INTJ) works with deliberate effort. Worst fit: ESFP (opposite on most dimensions and triggers INTJ contempt).

Do INTJs have romantic relationships or just logical partnerships?

INTJs can love deeply, but they express it logically (through reliable action) rather than emotionally (through words). A partner who interprets INTJ loyalty as cold misses the depth of care. INTJs show love by planning your future, solving your problems, and choosing you consistently—even if they rarely say "I love you."