I met someone new but my recent breakup is too fresh. what should I do?

So basically I just got out of a 3.5 relationship. It’s only been less then 3 months since the breakup but I’m having trouble moving on. Well I ended up meeting a girl a month after the breakup on complete accident. Wasn’t even looking for anyone she just kind of came into my life which is great. She understands the position I’m currently in but is sticking around for me. I told her I don’t want to promise her that I’ll be ready anytime soon but also don’t want to use her and waste her time. She said that she is fine with it. We’ve been getting a little too close. Been getting very intimate with each other and we talk and hang almost daily. I do like her a lot but I’m scared I will hurt her if we continue. Because at this point I’m still not completely over my ex. We have been in contact almost daily and I know that if one day she wants me back I will drop everything to be with her. I’m currently doing no contact, been going on for a week now but now my new girl just mentioned that she thinks I’m using her and that she doesn’t know where this is going when clearly we have already talked about it. At the end of the day I just want some clarity, should I wait, heal first and potentially lose her or should I tell her I want to take the next step and make it official because who knows maybe she’ll make me forget my last.
I met someone new but my recent breakup is too fresh. what should I do?
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