Search Results: get over your first real love

Quick background:
-Both in highschool
-didnt find out till later, but apparently I started talking to her JUST after she broke up with her ex boyfriend (who was her first serious boyfriend ever)
-We date, things are fine, then suddenly she pulls back and admits to loving and missing her ex
-She tells me its her fault for not trying to get over him, and i admit im a little at fault for jumping into a relationship with her kinda fast.

This was her like major text to me about our break up:
What do you want me to say (my name) ? I care about you, I do. You dont have to believe me, I don't control your feelings. I just... it is unfair of me to be with you while I am inlove with someone else. I love __, I always have. And thats my fault, not yours. My feelings for you were real, i truly mean that. but __... __ will always have a part of me that I'll never even understand. I don't know what the future holds, but I know it will not be good for you and I if we stay together with me loving someone else, at least for the time being.

What does she mean by the "at least for the time being"? My intrepretations was "loving someone else for the time being" but I don't know maybe she meant talking about the future not being good? Any intrepretations? Because it seems like she maybe hinting she doesn't know if she'll actually stay back with him (at least thats my wishful thinking, hence why i wanted to ask other opinions!)