<human>: Can you give me the gist of the text in a nutshell?

My ex was my high school boyfriend/first love. We dated a year and then it was off and on for many years after. I consider him the love of my life but the relationship has been a bit toxic, mostly due to mistakes we both made. He slept with my ex best friend and I did a number of bad things to get him to that point I guess (this was not while we were together). We were also long distance and very young. Our families also don't like each of us. It plays a big role. 

Then enter my now boyfriend who I do love very much but I can't get to the level of love I had or maybe still have for my ex. Some say I have a mature love now, but to me it lacks the same passion. I should also mention I live with this boyfriend, so if we were to break up it would be very hard on him. Which I don't want. 

My ex has asked me to leave my boyfriend and try and start things up with him again. When I wouldn't make a decision he blocked me on instagram and facebook and will not answer any of my texts.  He has done this before to possibly drive me to chase him. Which always works. Or possibly he is trying to move on from me. I keep feeling like I should make a bold gesture and leave my boyfriend and go chase after my ex. A part of me knows I will get hurt but I feel like if I don't do this I will resent my current boyfriend but also I'll really hurt him if I do. Or I'm giving up something great for something that is no longer great. I can't seem to give up the memory of what was. I truly need help. Maybe someone who's been through the same thing.
<bot>: thinking of leaving boyfriend of 5 years to be with high school boyfriend who I have wanted to be with again for many years. Don't want to make the wrong choice.