One-word replies are draining, but dry does not always mean uninterested. Some people just are not natural texters, or they need better prompts to open up.
Stop carrying the whole conversation and start sending messages that are actually fun to answer. If they stay dry after that, you have your answer.
How was your day gets good. Ask specific, playful, or opinion-based questions that are hard to answer in one word.
If you are sending paragraphs and getting lol, match their energy instead. Pull back and let them step up.
Offer a this-or-that, a hot take, or a playful challenge. Low effort to reply, high chance of a real response.
It can mean low interest, but often it is just texting style or a lack of good prompts. Change what you send before assuming the worst.
Avoid accusing them of being boring. Send more engaging messages instead. If nothing changes, match their energy and invest elsewhere.
Ask open, specific, or playful questions and share a bit yourself. Give them something interesting to react to rather than a yes or no.