What kinda feelings are these really??

I'm 16 and i was in a 6 year relationship with a boy who i could have swore was the one. This january we broke up i never told him that it hurt me too now i regret it. After we broke up we didnt talk again till june at this time is when This new girl comes into play and i never explained how i felt i lied. So then i start flirting with a new boy to make the ex jealous my planned back fired and he hooked up with this girl. So i start talking to a new boy and he tells me about his addiction to porn and how he likes to play with him self why im texting him (at the time we are dateing) i grew up in a home where this was against every moral. I ended up breaking up with him after i found out he also had a mental issue and thank goodness i didnt go on any private dates with him cause i have no idea what he would of tried. So i now am stuck im in LOVE with my ex who i dated for 6 years but he is still with her but since they hooked up he isnt the same person and he knows it. I have no idea if or when we may have another shot but he still says stuff to my sister that makes it sound like he misses me to am i wrong to still be thinking about him? or do you think i only have these feelings because of the bad experience with mental dude?