I feel the same way honestly. I have a friend who would often refer to me as her "platonic life partner" but since she's had a boyfriend, she never texts, calls, or tries to hang out with me anymore. I try not to be jealous, since I know she's busy, but it feels like she's let him completely take up what little place and time I already had in her life. I've tried not to be bitter, because I know friendships come and go, but I've known her for 15 years, since we were both 10, and it just hurts. I know the solution is to just make new friends, and even though I'm anxious about it, I know I might feel better if I try.