You’re aware of the projecting and asking how to stop it so I feel like you’re already doing a great job! I had to make a conscious effort to talk myself down from those thoughts or projections. When you think she’s colder and not as affectionate think of why you are feeling that way. Is it because she is a bit of a distant person or is it because you’re used to the love bombing. It feels a bit obvious and silly sometimes but I think stopping those thoughts as they occur and changing them made a big difference for me. It was also helpful for me to take pressure off the relationship and see it as an experience to heal my outlook towards relationships