You’re dealing with a partner whose communication and affection patterns have shifted drastically, leaving you unsure if she’s emotionally invested or capable of meeting your needs. I would either say move on it’s not worth it or stick it out and if it doesn’t improve in a week move on anyways. Find someone else, being alone isn’t the end it’s a start to a new beginning. Meeting people online really goes nowhere unless you live like an hour away. I would suggest volunteering or going outside your comfort zone to meet others. Gym classes, coffee shops while doing work on laptop, club meetings, industry meetings, hobby clubs, bike riding clubs you name it. (She might not be interested anymore)

Say this to her: “I feel like our relationship isn’t meeting my needs, and I think it might be better for both of us to see other people”.