When do you just give up with some mum friends? 🫠

I became friend with a lady when we were both pregnant with our first LO. We were 2 weeks part. We spoke most weeks but after I had my Lo she went ghost then messaged me 3 months later to let me know she had her baby 3 months ago. I wasn’t really that bothered because I was also a new mum and was in my own little bubble. All this was 3 years go. Over the years, we have both had major life event happened like family issues, family members passing away, mum life and all that. Everytime she would have something happened, I would be so supportive and be available as a support. I would even offer to look after a LO when she needed a break. But with me I’ve had the opposite experience with her. She would always ask what’s wrong if i mentioned I’ve feeling a bit down and this usually happens over text and the second I texted her the details she disappears for days or even weeks without acknowledging my message and come back like nothing happened and this has happened 5 separate times with major events. One of the time I was really overwhelmed and my husband was away for work and I was like crying my eyes out and I had just had an operation and her response was “oh gosh… shame you don’t have anyone to take your Lo for you for a few hours, I can’t because she will probably get upset with me” mind you we hang out and go to play groups together and my Lo actually likes her. I’ve had 3 major things happened in the last 4 months and all them she has asked me when happened then completely ghosted. The last one was literally last week and she texted me saying what’s going on and that’s she’s here for me and literally sent her an explaining my situation paragraph and she completely ghosted me. I honestly don’t think I have any interest is being in a one sided friendship. Am I overthinking this here? I feel like I gave her enough chance and I feel like am being used.