All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
This kind of relationship which leads to what is mentioned in the question, like corresponding on the internet or direct meetings in the manner which you described is a means that may lead to committing what is forbidden, and seriously open the door to temptation, while Allaah forbade following the steps of the devil as He Says (what means): {O you who have believed, do not follow the footsteps of Satan. And whoever follows the footsteps of Satan — indeed, he enjoins immorality and wrongdoing.}[Quran 24:21]
This matter is even more abominable if it happens between a man and a woman who both are already married. If a man is blessed with a wife and if a woman is blessed with a husband, then he/she has competed the other half of his/her religion, so he/she should fear Allaah in the other half, as stated in an authentic Hadeeth.
To conclude, both of you must immediately stop this relationship and repent to Allaah, otherwise you may end up doing something you would regret when it is too late. Indeed, this has nothing to do with the love for the sake of Allaah as the Sharee’ah does not approve of such a relationship or such meetings between a man and a non-Mahram woman.
Also, the consultation and advice and other matters which you mentioned in the question between you and that man is something that should happen between a husband and his wife and this would lead them to have more affection towards each other and good marital relationship, but not between a man and a non-Mahram woman. For more benefit, please refer to Fataawa 84833 and 84544.
Allaah Knows best.