I can offer some possible explanations for such a reaction:
Emotional release: Sometimes, when we hear words of comfort and support, it can trigger an emotional release, especially if we have been holding in our feelings or going through a difficult time. Crying can be a natural way for the body to release built-up tension and stress.
Feeling understood and validated: Hearing that someone is there for you might make you feel understood and validated. This emotional connection can evoke tears as a way of expressing relief or gratitude for the understanding and support.
Feeling vulnerable: Accepting help or support from others can make you feel vulnerable. Crying might be a response to the sense of vulnerability that comes with allowing others to see your struggles and needs.
Past experiences: Crying might be linked to past experiences or traumas. If you've had previous encounters where people weren't there for you or let you down, hearing supportive words might bring up those memories and emotions.
Fear of burdening others: The idea of someone being there for you might trigger feelings of guilt or worry about burdening others with your problems, leading to tears.
Relief from loneliness: If you have been feeling isolated or alone, hearing that someone is there for you can be a powerful reminder that you are not alone. This relief may manifest in tears.
Mixed emotions: Sometimes, emotions are complex and can be a combination of various feelings. It's possible that you feel a mix of happiness, sadness, relief, and anxiety, which can result in tears.
If this emotional response is causing distress or significantly impacting your well-being, it's essential to consider seeking support from a mental health professional. They can help you explore these feelings in a safe and supportive environment and provide guidance on how to cope with and understand your emotions better. Remember, seeking help is a sign of strength, and you don't have to go through this alone.