When someone replies with a "thank you" followed by a heart emoji, it typically indicates that they are expressing sincere gratitude and appreciation. The heart emoji is a visual representation of love, care, or affection, and when used in conjunction with a "thank you," it amplifies the sentiment of gratitude.
In this context, the person is not only saying "thank you" for something you did or said but is also adding an extra touch of warmth and affection to their response. It can be seen as a way of saying, "Thank you, and I really appreciate what you did for me," or "Thank you, and I'm grateful for your kindness."
The heart emoji is often used to convey emotions that words alone might not fully express. So, when combined with a "thank you," it shows that the person is genuinely touched by your actions or words and wants to convey their feelings of fondness towards you.
Of course, interpretations may vary depending on the context of the conversation and the relationship you have with the person. In most cases, though, receiving a "thank you" along with a heart emoji is a positive and affectionate response.