I have an ISTP friend I've known for a couple years now. We started dating, but then he got back together with a girlfriend. We've never slept together, in fact, have only kissed each other once. We've maintained very casual contact for a couple years now (have gotten together 4 or 5 times, just for dinner. He's always tried to get me to have an affair with him (I haven't) but we also have a very intellectual relationship which I think is the reason I've maintained any contact with him. His girlfriend tried to leave him once by getting involved with another man (this is when we met) but it didn't work out as she wished. Now he's actually engaged to her but won't set a date for the wedding. He's still trying to pursue me to have an affair with him.
Is an ISTP more likely to do this than other "types"? Why get engaged to someone and still wish to have an affair with someone else? He has said that he doesn't believe relationships last forever. And now that he's engaged, he won't set the date? Seems like he's being dragged into everything. Can an ISTP be serious about someone, be engaged, and still pursue an affair with someone else? As an ENFP, this is really puzzling to me.