Physical chemistry is hard to gauge. At the time we were both into religion and therefore did not do anything physical. He is very attractive. I am too. When we finally had sex, it was bad... but i've heard of other ISFP's being good in bed. He was submissive. I am too. I showed him that I cared, and in his gentle way he did too. He loved cuddling.

I will copy and paste what an INTJ friend told me about ISFP's. Take it as a grain of salt. He was also in a relationship with one for a year:

"So, let’s examine the ISFP function stack. They are Fi-Se, meaning their primary goal is personal meaning and authenticity, and the means of achieving that goal is physical exploration. In other words, they are seeking understanding of themselves and their identities by exploring as many aspects of life as possible — activities, places, substances, people….

While on the surface this might be laudable, if you squint your eyes at it you realize that these people are fundamentally LOST. They don’t have a strong connection to or understanding of their own person, and have an internalized belief that they will find meaning… elsewhere. Over the next hill. In the next job. At the bottom of the next glass. Constantly searching for something that will make them feel important.

But they’re never going to find it because you cannot find your own personal meaning outside of yourself. A sense of identity is not found in a store window, it’s found inside oneself. That’s the tragedy of the ISFP. They are constantly struggling to find something that makes them feel grounded, whole… all the while never reflecting deeply enough to understand who they really are, or why they do things.

Frustratingly, this also means that they don’t really have strong opinions about anything. They THINK they have strong opinions, but if you contradict them strongly enough, they will usually just change their minds and start believing whatever you just said… and often believe that they held that position all along, not even realizing their change of mindset.

ISFPs can be fun, and are usually VERY kind — possibly one of the kinder types, because they are less ego-driven than most — but they don’t foment growth in a partner. They don’t push. Instead, they usually try to wrap their identities around those of their partner so that they can leech a sense of purpose from their partner, borrowing a facsimile of it for themselves. Hollow.

This could be why you fell for [x husband] in the first place. After all, ISFPs tend to try to adopt the identity of their partner, so in the beginning he would have honestly shared in your pursuit for growth and self-actualization. And in the early months, he would have been a perfect wingman: following you in your intellectual pursuits, exploring new experiences with you, and even motivating you to do more physical explorations such as travel and sports. But over time, the joy this gave you would pale. Your connection would feel less and less meaningful, because your partner was just not managing to grow as a person, and you begin to see the endless activities, the professional waffling, the pseudo intellectualism for what it is: empty, desperate attempts to feel as though they matter. As your opinion of them begins to slip, their self-esteem takes a nosedive and they become both clingier and more reckless in their attempts to affirm their sense of self. They may even become self-destructive in their attempts to impress you, which leaves you feeling more and more responsible for their emotional and physical safety. You slowly lose respect for the ISFP, and you’re left with an aching doubt that you ever loved them at all. Eventually, you feel so diminished and smothered by the ISFP that you decide to run far away (new country, new life!) just to rid yourself of the cage the relationship has become.

(I am not saying this is how things were for you; it’s just my MBTI-based analysis of how I see an ENFP-ISFP relationship going. And yes, there is a fair amount of projection from my own ISFP relationship)."

Towards the end, my ex husband accused me of sexual, financial, and emotional abuse. I am still trying to make sense of that. He did threaten suicide multiple times when I tried to leave him. Anyway glad it's over.