Its super easy to cater to someone's every whim if you're not dating or just starting to talk. You're super into everything they do and you'll spend hours on something that doesn't interest you at all just to spend a few seconds with them.

This is entirely unsustainable. Once a relationship starts suddenly the real world comes crashing back. Volunteering at a shelter? I worked all week, I just need some me time.

Also, kudos for having a trusting boyfriend. From what you've said, he shouldn't be so trusting, since you're inviting this other guy you're clearly into to everything you do.

Post again in a month or two when you've moved on to new guy and the shine wears off some.