My boyfriend and I have been dating now for nearly 3 months and he went on holiday about 2 weeks ago and he met some girl there however she fancies him and I got a little jealous and when he came back I thought he may have forgotten about her since he lives in manchester and she lives in london but then he went to shrewsbury for his birthday when she came down to manchester but before he eft she gave him his present and asked him if he wants to go down to london for a sleepover so he asked me and I was not okay with it as just about anything could happen then when I told him that, it was quite fragile between the two of us then he said he was going to sleep at his mates now he's back an he's acting weird e.g he keeps telling me he loves me, he keeps avoiding me by changing our plans etc