Here's the cure:
1. Buy bikes that are not your size. Makes letting them go so much easier.
2. Evaluate any addition against your current fleet: one bike in, one bike out.
3. Set a realistic financial limit, based on family finances.
4. Find a donor bike and upgrade one of your current bikes. Fall in love again!
On storage, a recent remodel cut my storage and shop area by 2/3. That has made parting so much easier.