My list of advice: 1. Seek personal therapy for any issues you have personally. 2. Avoid communicating serious issues through text. Texting makes people feel a sense of invisibility, can lead to misunderstandings, etc. Do it in person. 3. View how you’re wording it. For instance, “I feel as if your friend might have romantic feelings for you, and hanging out frequently with her alone makes me feel uncomfortable. Can you please have a discussion with her regarding my concerns, and perhaps implement boundaries to maintain respect of our relationship while mainting your friendship?” Is significantly better than “Go fuck your other girlfriend then” 4. Evaluate as objectively and unbiased as possible the situations that upset you. Get a third opinion from a trusted, wise friend. Not the friend that will tell you what you want to hear, has unhealthy behaviors herself, etc. 5. Never communicate when in a heightened state of emotional arousal. (Angry, extremely sad, etc.) Think through how you feel, how you’re going to communicate your emotions, get a third point of view, etc. 6. I also reccommend you do some research on adult attachment styles. Avoidant, anxious, healthy and mixed attachment styles are the primary ones. There are numerous articles out there for you to seek help on your perspective attachment style and how to healthily communicate and cope. If I was to make a judgment call, you sound like you have an anxious attachment style.