Honeymoon Trip to Thailand

Hi everyone! My partner and I are planning a honeymoon trip to Thailand, and I’d really appreciate some advice.

It’s my first time visiting, but my partner has been several times. He’s suggesting Phuket, but I’m a bit hesitant — it seems too crowded and I’m not really into nightlife. I’d prefer less touristy, more scenic and peaceful areas, but still want to experience the beauty of Thailand. We’re also looking for budget-friendly options — for accommodation, food, and things to do. Planning to travel in either June or August. Any insights on which month is cheaper or better for weather and hotel deals? Would love your thoughts on where we could go that offers a romantic, relaxing vibe without being overrun with tourists. Thanks so much!