We all know that we are not under the old covenant Law, we are under the law of Christ, which still commands us to live in a certain way (to love as He loves). Since God has already permanently forgiven us at the cross, what is the ramification of sinful choices in our lives?
The wrath of God no longer exists, which means we do not make Him angry. We are pre-forgiven and eternally loved, meaning that He will always forgive anything we may do. However, when we sin, we can still grieve the Holy Spirit, which Paul discussed in Ephesians 4.
When we chose to sin, we are not living up to our identity as new creations in Christ, and we are not loving others as we should. This grieves the Holy Spirit, because He knows our potential, and He is hurt when His children hurt one another. It is not an issue of His forgiveness or love being removed; it is an issue of walking in the light and living in our identity.
Part of staying in step with the Holy Spirit is walking in vulnerability and transparency, living with an open heart. When we do this, we will be less and less likely to grieve the Holy Spirit with our actions and attitudes.