i was in touch with my ex and he even flirted with me. but he has stopped talking to me and ignoring my messages. i am feeling very frustrated and upset

Dear friend, I'm sorry to hear that you're feeling frustrated and upset about your ex ignoring you. It's understandable that you would feel this way - you were in touch with him and even received some positive signals, but now he's stopped communicating with you. It can be difficult to deal with uncertainty and unanswered questions, especially when it comes to matters of the heart. From a Buddhist perspective, it's important to remember impermanence and the truth of change. Relationships, like all things, are constantly in flux and nothing remains the same forever. Accepting this truth can help you let go of attachment to the outcome and find peace in the present moment. It's also important to practice compassion, both for yourself and for your ex. Recognize that he may be going through his own struggles and that his behavior is not necessarily a reflection of your worth or value as a person. From a psychological perspective, it's normal to feel frustrated and upset when someone we care about suddenly stops communicating with us. It can trigger feelings of rejection, abandonment, and uncertainty. It may be helpful to take some time to process these emotions and explore what they might be telling you about your needs and desires in a relationship. It's also important to remember that you have agency in this situation - you can decide whether or not to continue reaching out to your ex, and you can also focus on taking care of yourself and finding fulfillment in other areas of your life. In terms of coaching advice, I would encourage you to reflect on what you want and need in a relationship and whether or not this person is able to meet those needs. It may be helpful to set clear boundaries for yourself around communication and to honor those boundaries even if it feels difficult. I would also encourage you to focus on cultivating self-compassion and self-care, whether that means practicing mindfulness, engaging in enjoyable activities, or seeking support from friends or a therapist. Remember that you are capable of finding love and fulfillment in your life, regardless of what happens with your ex.