How do you navigate personal relationships?

I’ve never been diagnosed with autism officially but I struggle a lot socially and always have. I have extreme difficulty making friends and maintaining existing friendships and I don’t know how to improve on this. I try to set reminders in my phone to call/text certain people but I still get side tracked especially now that I’m finally in college. I have a habit of not speaking to people for weeks or months at a time and it causes strain on my relationships because the other person is consistently unhappy with this lower amount of interaction.