[i]can
Since you’ve only been dating the woman you’re currently seeing for three months means that you’re still just getting to know her. It shouldn’t be assumed by either of you that the other is monogamous since dating is a process where you get to know who you want to continue spending time with. It sounds like you’re not really interested in monogamy with this woman since you’re still interested elsewhere. You should respect that about yourself. The relationship you have with you ex-girlfriend, with whom you have an adult daughter, is more complicated. I know you have chemistry, but there’s a reason you’re not together in a relationship any more. That said — you may not be ready for a monogamous relationship and there is absolutely nothing wrong with that…. as long as you don’t misrepresent yourself to anyone (including yourself!).
I hope that helps. Let me know how things go — and please follow me @AskAprilcom on Twitter.