There is something many people have felt or is currently feeling for someone and will most probably feel it again at some point. It's a rush that comes from inside and flows through the heart and just wants to reach to a special someone. I can happen even if they haven't seen each other yet, but only had an online chat or a call. This energy sings I love you and it can be any type of love. It is extremely necessary to let it flow to the other person because once this starts to build up with no release it can create frustration and a feeling of something being incomplete. Also when the other person rejects this love energy it can create some disturbance and both people will start to feel annoyance with each other or even irritated.
Many people doesn't understand why they are feeling this way and some try to avoid seeing it for what it is, and this lack of understanding makes them shut it up inside. But once you allow yourself to understand this, you will know how to approach the other person with a reasonable explanation of what is going on inside you, and if it's something that can be awkward just let them know that you have this energy in you wanting to flow to the other person, that is a good energy and that you can't keep it in because it's hurting to hold it back. There are ways you can use to let the other know what you need from them. It's just a simple "yes I accept your energy".
In some cases this can be a matter of concluding an old relationship, having a resolution.
It is a beautiful thing to feel and extremely important to be shared as it comes to you, it's your heart song of love. Remember you are made of energy, the love that you feel is your creation, and it is designed to carry a piece of you.
Also it can be that you are carrying a piece of this other person in you and it wants to be released. So in any case just let your heart flow when it's needed. This will also help you in your health and well being. Movement is necessary for life to continue, energy needs to flow.