<human>: Can you summarize the given text in a few sentences?

For a brief background on our story we dated for two years, and about a year ago broke up. The break up was my fault I got kind of careless, and lazy. I was too young to know better, and too stubborn to fix things. Well ever since then we haven't talked much maybe once every several months.

So we really started talking again, and admitted we still had feelings for each other. Which I guess is fine if it stays that way and we never date or do anything, or she tells her current partner. What she wants to do though is wait till the summer to break up with him, and start dating? I'm trying to go about this slow so I said it was okay at the time, but that doesn't seem fair to either him or me. She says she doesn't really like him that much anymore. I believe that she doesn't want to date him anymore, but I don't believe that she's lost all feelings for him.

I don't want to seem like I'm pushing an ultimatum or anything so giving one is totally out of the question. (By giving an ultimatum I mean telling her that she has to break up with him or nothing happens between us) I just think making me wait till the summer, and forcing me to be single while not notifying her boyfriend of her intentions is rude. Her reasoning behind doing it is because she will have to see him at after school activities.

What should I tell her? I don't want what I'm saying to seem like an ultimatum at all? Should I just cut my losses, and continue trying to move on from her? I can 100% believe that she's telling the truth when she says we will get back together in the summer. I just have been taking it slow so that I don't mess this chance up.
<bot>: My ex and I started talking again very recently, and we want to get back together. She's also dating someone else, and doesn't want to break things off till the summer. So she wants me to wait until then.