I feel like my friend only uses me when she's bored

Now I don't need any rude comments I just want to ask opinions on what you would do. She's in a relationship her boyfriend lives with her and her parents they don't have their own place. Basically if her an her boyfriend get in an argument or if she's feeling sad cause of him she would call me an that's not the first time. Also, if he goes out for a walk she will call me an when he gets home when we're on the phone she would just be like oh he's home I'm going to spend time with him I'll talk to you later like I can never really just have a normal chill one on one conversation and sometimes if I do try to talk to her she only gives me one word like oh, yeah, dang, lol, like she's fuckin boring an it just seems like she uses me just to talk about her damn boyfriend