I miss my mom

I’m not trying to sound like a baby here but I only see my mom a couple times a year now. I used to see her all the time. I only live an hour away. My son (18 months) doesn’t even know who she is. When my son was born her bf was going through some stuff medically and she was always busy whenever I asked her if she could come over. I eventually just stopped asking figured she would let me know when she wasn’t busy anymore and wanted to come see us. I just feel like there is no way she is as busy as she says she is. I feel like she’s abandoned me (again) and my son. I know it might sound stupid and like I’m being childish but I can’t really help it. I miss her.😭😞