Are we allowed to give outside perspective here? Oh well, if not I will remove this.
Basically it seems that the F and the P are getting in the way of the T and the J. I may be biased, but I have seen several posts that are just saying that a lot of you are being pulled by your P towards other people and you are unable to reign in your E that is influencing your P so much. Engage your T to influence your P about your future with this person you have doubts about, and then use your E again to influence your J instead of your P in order to come to a conclusion about whether or not this is the right relationship for you. Channel your emotions into your thoughts and your thoughts into your perception and your perception into your judgment.
Trust me, this is really hard to do. I recently opened up emotionally to a complete stranger based on a feeling I had. Trust your intuition because it is nearly always correct, and when your dominant letters fail you, trust your secondary letters. Remember, MBTI is a way to show us our strengths and our weaknesses. While our dominant traits are our strengths, that doesn't discount the validity of our weaker traits.
Think about this. If you have doubts, ask yourself this question: Do I see myself X number of <time unit> in the future <romantic milestone here>? This is key I think. You are looking at a relationship. Relationships are between two people. You may have a group of friends that all like each other, but your relationships with those friends are different. Yes ENFPs love everyone, but they're still each unique. Your romantic relationships are the same way. You have a unique relationship with that person, good or bad. You need to focus on one person and think of all of the possibilities, good or bad, and come to a conclusion. Yes that other person looks fun, and maybe you can have a great friendship with them, but here is this one person that you have invested in and they have hopefully invested in you. Is that investment accruing or is it diminishing. If it's accruing, buy, buy, buy. If it's diminishing, sell, sell, sell. If you invest your emotions in one person after the other, after the other, after the other, that investment will never grow. It will stagnate.
Last analogy and I will go back to INTJland. Remember that song "The Bear Went Over The Mountain"? Well why did that bear go over the mountain? To see what he could see. And what did that bear find once he reached the top? The other side of the mountain. Yes mystery is fun and exciting (INTJs LOVE mystery), but sometimes you just have to leave some mysteries unexplored and revel in your current discovery.
*beats a hasty retreat*