Instead of trying to change your emotions permanently, you could focus them one someone who will reciprocate them. Specifically, instead of summoning a demon, you could get close to your guardian angel 
. Other people refer to these beings as Daimones or Fylgjur or Fravashi – many cultures are aware of them, so please don’t think of them as angels in the Christian 
sense. Actual angels are not at all how the Abrahamic religions portray them.
Depending on how well developed your astral senses are, you will notice sooner or later that he is the most attractive person you’ve ever met. You will also find that your… physical needs will be met in this relationship, via doing something on both the physical and the astral plane 
. This is discussed in other contexts in this very forum.
Obviously your guardian angel – or whichever term you prefer – is always with you, and once you’ve established communication and developed your astral senses, you can always reach out to him 
.
Of course I don’t know you personally, but I feel that this approach is perhaps more practical than making oneself unable to fall in love. However, this is of course for you to figure out and decide 
.