<human>: Can you give me a shortened version of the text?

Im 21, currently in college. Im not sure if this is the right subreddit but here goes; So i have been in a relationship only once - and it happend when i was around 6-7, it was love at first sight for both. We've been together through primary school and 3 years into highschool. We split up cause i couldnt commit to the relationship but my feeling never changed i just couldnt express it. 

Anyway now im 21 i have been single since the break up and everytime i find interest in a girl, i ask myself is this love? or im just forcing myself - creating a fake feeling to "improve" my life? then i watched a video on youtube where this was actually addressed - Love might be a trick of biology for us to procreate etc the name is "Why do we love? A philosophical inquiry - Skye C. Cleary" on youtube

what i want to know is how to know u're really in love? is love at first sight the real love? because i've experienced it and never actually felt that with any other girl. It wont be a trick of biology, we were just around 6-7 years old . I also read a recent book "modern love" where it explain that nowadays we search qualities/atributes into someone rather than marrying your classmate/collegue or a girl in the neighbourhood - What if we find a girl with everything we're looking for do we unconsciously force ourself to say "shes the one" ?
<bot>: Is love at first sight the only love? how to know its real love with someone ? are we loving somebody just to make our lives better?