That description actually sounds like it jewish concept of the "holy spirit" or Shekhina. It is attributed to the heightened awareness of God, and is symbolised as the feminine aspects of god. That would go along perfectly with the 'feelings of love' (a motherly type of love).
In the Jewish conception, that is just one aspect of a 'ONE GOD', not a seperate part of a trinity.
The experiance that people attribute to the holy spirit is the way the brain works. Certain parts of the brain gets stimulated, and certain parts of the brain get 'quiessed' when this state is achieved. Take a look at some of the studies by "Dr Andrew Newberg"
Of course, that just describes what physcially happens with the brain during prayer/mediation/mystical experiances. It does not prove/disprove the existance of an external 'Holy Spirit'.