Ex partner moved away and denies me seeing child, yet is now asking for child maintenance

Hey guys, 19 year old dad from England looking for some advice. Me and my ex girlfriend split up shortly after our now almost 2 year old daughter was born. She has since found a new boyfriend and decided to move 2 hours away with him. Since this she has made it increasingly difficult to see my daughter due to being so far away and never making the trip herself (I drive and she doesn’t) Forcing me to do it. She has now came to me requesting child maintenance after deliberately making it difficult for me to see my daughter. What’s my legal standing here, or what route do I need to take. I personally didn’t mind having my daughter only on the weekend so I was available do the travelling due to work. However if me attempting to help out is going to lead to this I’m not entirely sure what else I can do. Help please